[−][src]Struct actix_web::web::BytesMut
A unique reference to a contiguous slice of memory.
BytesMut
represents a unique view into a potentially shared memory region.
Given the uniqueness guarantee, owners of BytesMut
handles are able to
mutate the memory. It is similar to a Vec<u8>
but with less copies and
allocations.
For more detail, see Bytes.
Growth
One key difference from Vec<u8>
is that most operations do not
implicitly grow the buffer. This means that calling my_bytes.put("hello world");
could panic if my_bytes
does not have enough capacity. Before
writing to the buffer, ensure that there is enough remaining capacity by
calling my_bytes.remaining_mut()
. In general, avoiding calls to reserve
is preferable.
The only exception is extend
which implicitly reserves required capacity.
Examples
use bytes::{BytesMut, BufMut}; let mut buf = BytesMut::with_capacity(64); buf.put(b'h'); buf.put(b'e'); buf.put("llo"); assert_eq!(&buf[..], b"hello"); // Freeze the buffer so that it can be shared let a = buf.freeze(); // This does not allocate, instead `b` points to the same memory. let b = a.clone(); assert_eq!(&a[..], b"hello"); assert_eq!(&b[..], b"hello");
Methods
impl BytesMut
[src]
pub fn with_capacity(capacity: usize) -> BytesMut
[src]
Creates a new BytesMut
with the specified capacity.
The returned BytesMut
will be able to hold at least capacity
bytes
without reallocating. If capacity
is under 4 * size_of::<usize>() - 1
,
then BytesMut
will not allocate.
It is important to note that this function does not specify the length
of the returned BytesMut
, but only the capacity.
Examples
use bytes::{BytesMut, BufMut}; let mut bytes = BytesMut::with_capacity(64); // `bytes` contains no data, even though there is capacity assert_eq!(bytes.len(), 0); bytes.put(&b"hello world"[..]); assert_eq!(&bytes[..], b"hello world");
pub fn new() -> BytesMut
[src]
Creates a new BytesMut
with default capacity.
Resulting object has length 0 and unspecified capacity. This function does not allocate.
Examples
use bytes::{BytesMut, BufMut}; let mut bytes = BytesMut::new(); assert_eq!(0, bytes.len()); bytes.reserve(2); bytes.put_slice(b"xy"); assert_eq!(&b"xy"[..], &bytes[..]);
pub fn len(&self) -> usize
[src]
Returns the number of bytes contained in this BytesMut
.
Examples
use bytes::BytesMut; let b = BytesMut::from(&b"hello"[..]); assert_eq!(b.len(), 5);
pub fn is_empty(&self) -> bool
[src]
Returns true if the BytesMut
has a length of 0.
Examples
use bytes::BytesMut; let b = BytesMut::with_capacity(64); assert!(b.is_empty());
pub fn capacity(&self) -> usize
[src]
Returns the number of bytes the BytesMut
can hold without reallocating.
Examples
use bytes::BytesMut; let b = BytesMut::with_capacity(64); assert_eq!(b.capacity(), 64);
pub fn freeze(self) -> Bytes
[src]
Converts self
into an immutable Bytes
.
The conversion is zero cost and is used to indicate that the slice referenced by the handle will no longer be mutated. Once the conversion is done, the handle can be cloned and shared across threads.
Examples
use bytes::{BytesMut, BufMut}; use std::thread; let mut b = BytesMut::with_capacity(64); b.put("hello world"); let b1 = b.freeze(); let b2 = b1.clone(); let th = thread::spawn(move || { assert_eq!(&b1[..], b"hello world"); }); assert_eq!(&b2[..], b"hello world"); th.join().unwrap();
pub fn split_off(&mut self, at: usize) -> BytesMut
[src]
Splits the bytes into two at the given index.
Afterwards self
contains elements [0, at)
, and the returned
BytesMut
contains elements [at, capacity)
.
This is an O(1)
operation that just increases the reference count
and sets a few indices.
Examples
use bytes::BytesMut; let mut a = BytesMut::from(&b"hello world"[..]); let mut b = a.split_off(5); a[0] = b'j'; b[0] = b'!'; assert_eq!(&a[..], b"jello"); assert_eq!(&b[..], b"!world");
Panics
Panics if at > capacity
.
pub fn take(&mut self) -> BytesMut
[src]
Removes the bytes from the current view, returning them in a new
BytesMut
handle.
Afterwards, self
will be empty, but will retain any additional
capacity that it had before the operation. This is identical to
self.split_to(self.len())
.
This is an O(1)
operation that just increases the reference count and
sets a few indices.
Examples
use bytes::{BytesMut, BufMut}; let mut buf = BytesMut::with_capacity(1024); buf.put(&b"hello world"[..]); let other = buf.take(); assert!(buf.is_empty()); assert_eq!(1013, buf.capacity()); assert_eq!(other, b"hello world"[..]);
pub fn split_to(&mut self, at: usize) -> BytesMut
[src]
Splits the buffer into two at the given index.
Afterwards self
contains elements [at, len)
, and the returned BytesMut
contains elements [0, at)
.
This is an O(1)
operation that just increases the reference count and
sets a few indices.
Examples
use bytes::BytesMut; let mut a = BytesMut::from(&b"hello world"[..]); let mut b = a.split_to(5); a[0] = b'!'; b[0] = b'j'; assert_eq!(&a[..], b"!world"); assert_eq!(&b[..], b"jello");
Panics
Panics if at > len
.
pub fn truncate(&mut self, len: usize)
[src]
Shortens the buffer, keeping the first len
bytes and dropping the
rest.
If len
is greater than the buffer's current length, this has no
effect.
The split_off
method can emulate truncate
, but this causes the
excess bytes to be returned instead of dropped.
Examples
use bytes::BytesMut; let mut buf = BytesMut::from(&b"hello world"[..]); buf.truncate(5); assert_eq!(buf, b"hello"[..]);
pub fn advance(&mut self, cnt: usize)
[src]
Shortens the buffer, dropping the first cnt
bytes and keeping the
rest.
This is the same function as Buf::advance
, and in the next breaking
release of bytes
, this implementation will be removed in favor of
having BytesMut
implement Buf
.
Panics
This function panics if cnt
is greater than self.len()
pub fn clear(&mut self)
[src]
Clears the buffer, removing all data.
Examples
use bytes::BytesMut; let mut buf = BytesMut::from(&b"hello world"[..]); buf.clear(); assert!(buf.is_empty());
pub fn resize(&mut self, new_len: usize, value: u8)
[src]
Resizes the buffer so that len
is equal to new_len
.
If new_len
is greater than len
, the buffer is extended by the
difference with each additional byte set to value
. If new_len
is
less than len
, the buffer is simply truncated.
Examples
use bytes::BytesMut; let mut buf = BytesMut::new(); buf.resize(3, 0x1); assert_eq!(&buf[..], &[0x1, 0x1, 0x1]); buf.resize(2, 0x2); assert_eq!(&buf[..], &[0x1, 0x1]); buf.resize(4, 0x3); assert_eq!(&buf[..], &[0x1, 0x1, 0x3, 0x3]);
pub unsafe fn set_len(&mut self, len: usize)
[src]
Sets the length of the buffer.
This will explicitly set the size of the buffer without actually modifying the data, so it is up to the caller to ensure that the data has been initialized.
Examples
use bytes::BytesMut; let mut b = BytesMut::from(&b"hello world"[..]); unsafe { b.set_len(5); } assert_eq!(&b[..], b"hello"); unsafe { b.set_len(11); } assert_eq!(&b[..], b"hello world");
Panics
This method will panic if len
is out of bounds for the underlying
slice or if it comes after the end
of the configured window.
pub fn reserve(&mut self, additional: usize)
[src]
Reserves capacity for at least additional
more bytes to be inserted
into the given BytesMut
.
More than additional
bytes may be reserved in order to avoid frequent
reallocations. A call to reserve
may result in an allocation.
Before allocating new buffer space, the function will attempt to reclaim space in the existing buffer. If the current handle references a small view in the original buffer and all other handles have been dropped, and the requested capacity is less than or equal to the existing buffer's capacity, then the current view will be copied to the front of the buffer and the handle will take ownership of the full buffer.
Examples
In the following example, a new buffer is allocated.
use bytes::BytesMut; let mut buf = BytesMut::from(&b"hello"[..]); buf.reserve(64); assert!(buf.capacity() >= 69);
In the following example, the existing buffer is reclaimed.
use bytes::{BytesMut, BufMut}; let mut buf = BytesMut::with_capacity(128); buf.put(&[0; 64][..]); let ptr = buf.as_ptr(); let other = buf.take(); assert!(buf.is_empty()); assert_eq!(buf.capacity(), 64); drop(other); buf.reserve(128); assert_eq!(buf.capacity(), 128); assert_eq!(buf.as_ptr(), ptr);
Panics
Panics if the new capacity overflows usize
.
pub fn extend_from_slice(&mut self, extend: &[u8])
[src]
Appends given bytes to this object.
If this BytesMut
object has not enough capacity, it is resized first.
So unlike put_slice
operation, extend_from_slice
does not panic.
Examples
use bytes::BytesMut; let mut buf = BytesMut::with_capacity(0); buf.extend_from_slice(b"aaabbb"); buf.extend_from_slice(b"cccddd"); assert_eq!(b"aaabbbcccddd", &buf[..]);
pub fn unsplit(&mut self, other: BytesMut)
[src]
Combine splitted BytesMut objects back as contiguous.
If BytesMut
objects were not contiguous originally, they will be extended.
Examples
use bytes::BytesMut; let mut buf = BytesMut::with_capacity(64); buf.extend_from_slice(b"aaabbbcccddd"); let splitted = buf.split_off(6); assert_eq!(b"aaabbb", &buf[..]); assert_eq!(b"cccddd", &splitted[..]); buf.unsplit(splitted); assert_eq!(b"aaabbbcccddd", &buf[..]);
Methods from Deref<Target = [u8]>
pub const fn len(&self) -> usize
1.0.0[src]
pub const fn is_empty(&self) -> bool
1.0.0[src]
pub fn first(&self) -> Option<&T>
1.0.0[src]
Returns the first element of the slice, or None
if it is empty.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&10), v.first()); let w: &[i32] = &[]; assert_eq!(None, w.first());
pub fn first_mut(&mut self) -> Option<&mut T>
1.0.0[src]
Returns a mutable pointer to the first element of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some(first) = x.first_mut() { *first = 5; } assert_eq!(x, &[5, 1, 2]);
pub fn split_first(&self) -> Option<(&T, &[T])>
1.5.0[src]
Returns the first and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &[0, 1, 2]; if let Some((first, elements)) = x.split_first() { assert_eq!(first, &0); assert_eq!(elements, &[1, 2]); }
pub fn split_first_mut(&mut self) -> Option<(&mut T, &mut [T])>
1.5.0[src]
Returns the first and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some((first, elements)) = x.split_first_mut() { *first = 3; elements[0] = 4; elements[1] = 5; } assert_eq!(x, &[3, 4, 5]);
pub fn split_last(&self) -> Option<(&T, &[T])>
1.5.0[src]
Returns the last and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &[0, 1, 2]; if let Some((last, elements)) = x.split_last() { assert_eq!(last, &2); assert_eq!(elements, &[0, 1]); }
pub fn split_last_mut(&mut self) -> Option<(&mut T, &mut [T])>
1.5.0[src]
Returns the last and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some((last, elements)) = x.split_last_mut() { *last = 3; elements[0] = 4; elements[1] = 5; } assert_eq!(x, &[4, 5, 3]);
pub fn last(&self) -> Option<&T>
1.0.0[src]
Returns the last element of the slice, or None
if it is empty.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&30), v.last()); let w: &[i32] = &[]; assert_eq!(None, w.last());
pub fn last_mut(&mut self) -> Option<&mut T>
1.0.0[src]
Returns a mutable pointer to the last item in the slice.
Examples
let x = &mut [0, 1, 2]; if let Some(last) = x.last_mut() { *last = 10; } assert_eq!(x, &[0, 1, 10]);
pub fn get<I>(&self, index: I) -> Option<&<I as SliceIndex<[T]>>::Output> where
I: SliceIndex<[T]>,
1.0.0[src]
I: SliceIndex<[T]>,
Returns a reference to an element or subslice depending on the type of index.
- If given a position, returns a reference to the element at that
position or
None
if out of bounds. - If given a range, returns the subslice corresponding to that range,
or
None
if out of bounds.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&40), v.get(1)); assert_eq!(Some(&[10, 40][..]), v.get(0..2)); assert_eq!(None, v.get(3)); assert_eq!(None, v.get(0..4));
pub fn get_mut<I>(
&mut self,
index: I
) -> Option<&mut <I as SliceIndex<[T]>>::Output> where
I: SliceIndex<[T]>,
1.0.0[src]
&mut self,
index: I
) -> Option<&mut <I as SliceIndex<[T]>>::Output> where
I: SliceIndex<[T]>,
Returns a mutable reference to an element or subslice depending on the
type of index (see get
) or None
if the index is out of bounds.
Examples
let x = &mut [0, 1, 2]; if let Some(elem) = x.get_mut(1) { *elem = 42; } assert_eq!(x, &[0, 42, 2]);
pub unsafe fn get_unchecked<I>(
&self,
index: I
) -> &<I as SliceIndex<[T]>>::Output where
I: SliceIndex<[T]>,
1.0.0[src]
&self,
index: I
) -> &<I as SliceIndex<[T]>>::Output where
I: SliceIndex<[T]>,
Returns a reference to an element or subslice, without doing bounds checking.
This is generally not recommended, use with caution! For a safe
alternative see get
.
Examples
let x = &[1, 2, 4]; unsafe { assert_eq!(x.get_unchecked(1), &2); }
pub unsafe fn get_unchecked_mut<I>(
&mut self,
index: I
) -> &mut <I as SliceIndex<[T]>>::Output where
I: SliceIndex<[T]>,
1.0.0[src]
&mut self,
index: I
) -> &mut <I as SliceIndex<[T]>>::Output where
I: SliceIndex<[T]>,
Returns a mutable reference to an element or subslice, without doing bounds checking.
This is generally not recommended, use with caution! For a safe
alternative see get_mut
.
Examples
let x = &mut [1, 2, 4]; unsafe { let elem = x.get_unchecked_mut(1); *elem = 13; } assert_eq!(x, &[1, 13, 4]);
pub const fn as_ptr(&self) -> *const T
1.0.0[src]
Returns a raw pointer to the slice's buffer.
The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.
The caller must also ensure that the memory the pointer (non-transitively) points to
is never written to (except inside an UnsafeCell
) using this pointer or any pointer
derived from it. If you need to mutate the contents of the slice, use as_mut_ptr
.
Modifying the container referenced by this slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.
Examples
let x = &[1, 2, 4]; let x_ptr = x.as_ptr(); unsafe { for i in 0..x.len() { assert_eq!(x.get_unchecked(i), &*x_ptr.add(i)); } }
pub fn as_mut_ptr(&mut self) -> *mut T
1.0.0[src]
Returns an unsafe mutable pointer to the slice's buffer.
The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.
Modifying the container referenced by this slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.
Examples
let x = &mut [1, 2, 4]; let x_ptr = x.as_mut_ptr(); unsafe { for i in 0..x.len() { *x_ptr.add(i) += 2; } } assert_eq!(x, &[3, 4, 6]);
pub fn swap(&mut self, a: usize, b: usize)
1.0.0[src]
Swaps two elements in the slice.
Arguments
- a - The index of the first element
- b - The index of the second element
Panics
Panics if a
or b
are out of bounds.
Examples
let mut v = ["a", "b", "c", "d"]; v.swap(1, 3); assert!(v == ["a", "d", "c", "b"]);
pub fn reverse(&mut self)
1.0.0[src]
Reverses the order of elements in the slice, in place.
Examples
let mut v = [1, 2, 3]; v.reverse(); assert!(v == [3, 2, 1]);
pub fn iter(&self) -> Iter<T>
1.0.0[src]
Returns an iterator over the slice.
Examples
let x = &[1, 2, 4]; let mut iterator = x.iter(); assert_eq!(iterator.next(), Some(&1)); assert_eq!(iterator.next(), Some(&2)); assert_eq!(iterator.next(), Some(&4)); assert_eq!(iterator.next(), None);
pub fn iter_mut(&mut self) -> IterMut<T>
1.0.0[src]
Returns an iterator that allows modifying each value.
Examples
let x = &mut [1, 2, 4]; for elem in x.iter_mut() { *elem += 2; } assert_eq!(x, &[3, 4, 6]);
pub fn windows(&self, size: usize) -> Windows<T>
1.0.0[src]
Returns an iterator over all contiguous windows of length
size
. The windows overlap. If the slice is shorter than
size
, the iterator returns no values.
Panics
Panics if size
is 0.
Examples
let slice = ['r', 'u', 's', 't']; let mut iter = slice.windows(2); assert_eq!(iter.next().unwrap(), &['r', 'u']); assert_eq!(iter.next().unwrap(), &['u', 's']); assert_eq!(iter.next().unwrap(), &['s', 't']); assert!(iter.next().is_none());
If the slice is shorter than size
:
let slice = ['f', 'o', 'o']; let mut iter = slice.windows(4); assert!(iter.next().is_none());
pub fn chunks(&self, chunk_size: usize) -> Chunks<T>
1.0.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the
beginning of the slice.
The chunks are slices and do not overlap. If chunk_size
does not divide the length of the
slice, then the last chunk will not have length chunk_size
.
See chunks_exact
for a variant of this iterator that returns chunks of always exactly
chunk_size
elements, and rchunks
for the same iterator but starting at the end of the
slice of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let slice = ['l', 'o', 'r', 'e', 'm']; let mut iter = slice.chunks(2); assert_eq!(iter.next().unwrap(), &['l', 'o']); assert_eq!(iter.next().unwrap(), &['r', 'e']); assert_eq!(iter.next().unwrap(), &['m']); assert!(iter.next().is_none());
pub fn chunks_mut(&mut self, chunk_size: usize) -> ChunksMut<T>
1.0.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the
beginning of the slice.
The chunks are mutable slices, and do not overlap. If chunk_size
does not divide the
length of the slice, then the last chunk will not have length chunk_size
.
See chunks_exact_mut
for a variant of this iterator that returns chunks of always
exactly chunk_size
elements, and rchunks_mut
for the same iterator but starting at
the end of the slice of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let v = &mut [0, 0, 0, 0, 0]; let mut count = 1; for chunk in v.chunks_mut(2) { for elem in chunk.iter_mut() { *elem += count; } count += 1; } assert_eq!(v, &[1, 1, 2, 2, 3]);
pub fn chunks_exact(&self, chunk_size: usize) -> ChunksExact<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the
beginning of the slice.
The chunks are slices and do not overlap. If chunk_size
does not divide the length of the
slice, then the last up to chunk_size-1
elements will be omitted and can be retrieved
from the remainder
function of the iterator.
Due to each chunk having exactly chunk_size
elements, the compiler can often optimize the
resulting code better than in the case of chunks
.
See chunks
for a variant of this iterator that also returns the remainder as a smaller
chunk, and rchunks_exact
for the same iterator but starting at the end of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let slice = ['l', 'o', 'r', 'e', 'm']; let mut iter = slice.chunks_exact(2); assert_eq!(iter.next().unwrap(), &['l', 'o']); assert_eq!(iter.next().unwrap(), &['r', 'e']); assert!(iter.next().is_none()); assert_eq!(iter.remainder(), &['m']);
pub fn chunks_exact_mut(&mut self, chunk_size: usize) -> ChunksExactMut<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the
beginning of the slice.
The chunks are mutable slices, and do not overlap. If chunk_size
does not divide the
length of the slice, then the last up to chunk_size-1
elements will be omitted and can be
retrieved from the into_remainder
function of the iterator.
Due to each chunk having exactly chunk_size
elements, the compiler can often optimize the
resulting code better than in the case of chunks_mut
.
See chunks_mut
for a variant of this iterator that also returns the remainder as a
smaller chunk, and rchunks_exact_mut
for the same iterator but starting at the end of
the slice of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let v = &mut [0, 0, 0, 0, 0]; let mut count = 1; for chunk in v.chunks_exact_mut(2) { for elem in chunk.iter_mut() { *elem += count; } count += 1; } assert_eq!(v, &[1, 1, 2, 2, 0]);
pub fn rchunks(&self, chunk_size: usize) -> RChunks<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the end
of the slice.
The chunks are slices and do not overlap. If chunk_size
does not divide the length of the
slice, then the last chunk will not have length chunk_size
.
See rchunks_exact
for a variant of this iterator that returns chunks of always exactly
chunk_size
elements, and chunks
for the same iterator but starting at the beginning
of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let slice = ['l', 'o', 'r', 'e', 'm']; let mut iter = slice.rchunks(2); assert_eq!(iter.next().unwrap(), &['e', 'm']); assert_eq!(iter.next().unwrap(), &['o', 'r']); assert_eq!(iter.next().unwrap(), &['l']); assert!(iter.next().is_none());
pub fn rchunks_mut(&mut self, chunk_size: usize) -> RChunksMut<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the end
of the slice.
The chunks are mutable slices, and do not overlap. If chunk_size
does not divide the
length of the slice, then the last chunk will not have length chunk_size
.
See rchunks_exact_mut
for a variant of this iterator that returns chunks of always
exactly chunk_size
elements, and chunks_mut
for the same iterator but starting at the
beginning of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let v = &mut [0, 0, 0, 0, 0]; let mut count = 1; for chunk in v.rchunks_mut(2) { for elem in chunk.iter_mut() { *elem += count; } count += 1; } assert_eq!(v, &[3, 2, 2, 1, 1]);
pub fn rchunks_exact(&self, chunk_size: usize) -> RChunksExact<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the
end of the slice.
The chunks are slices and do not overlap. If chunk_size
does not divide the length of the
slice, then the last up to chunk_size-1
elements will be omitted and can be retrieved
from the remainder
function of the iterator.
Due to each chunk having exactly chunk_size
elements, the compiler can often optimize the
resulting code better than in the case of chunks
.
See rchunks
for a variant of this iterator that also returns the remainder as a smaller
chunk, and chunks_exact
for the same iterator but starting at the beginning of the
slice.
Panics
Panics if chunk_size
is 0.
Examples
let slice = ['l', 'o', 'r', 'e', 'm']; let mut iter = slice.rchunks_exact(2); assert_eq!(iter.next().unwrap(), &['e', 'm']); assert_eq!(iter.next().unwrap(), &['o', 'r']); assert!(iter.next().is_none()); assert_eq!(iter.remainder(), &['l']);
pub fn rchunks_exact_mut(&mut self, chunk_size: usize) -> RChunksExactMut<T>
1.31.0[src]
Returns an iterator over chunk_size
elements of the slice at a time, starting at the end
of the slice.
The chunks are mutable slices, and do not overlap. If chunk_size
does not divide the
length of the slice, then the last up to chunk_size-1
elements will be omitted and can be
retrieved from the into_remainder
function of the iterator.
Due to each chunk having exactly chunk_size
elements, the compiler can often optimize the
resulting code better than in the case of chunks_mut
.
See rchunks_mut
for a variant of this iterator that also returns the remainder as a
smaller chunk, and chunks_exact_mut
for the same iterator but starting at the beginning
of the slice.
Panics
Panics if chunk_size
is 0.
Examples
let v = &mut [0, 0, 0, 0, 0]; let mut count = 1; for chunk in v.rchunks_exact_mut(2) { for elem in chunk.iter_mut() { *elem += count; } count += 1; } assert_eq!(v, &[0, 2, 2, 1, 1]);
pub fn split_at(&self, mid: usize) -> (&[T], &[T])
1.0.0[src]
Divides one slice into two at an index.
The first will contain all indices from [0, mid)
(excluding
the index mid
itself) and the second will contain all
indices from [mid, len)
(excluding the index len
itself).
Panics
Panics if mid > len
.
Examples
let v = [1, 2, 3, 4, 5, 6]; { let (left, right) = v.split_at(0); assert!(left == []); assert!(right == [1, 2, 3, 4, 5, 6]); } { let (left, right) = v.split_at(2); assert!(left == [1, 2]); assert!(right == [3, 4, 5, 6]); } { let (left, right) = v.split_at(6); assert!(left == [1, 2, 3, 4, 5, 6]); assert!(right == []); }
pub fn split_at_mut(&mut self, mid: usize) -> (&mut [T], &mut [T])
1.0.0[src]
Divides one mutable slice into two at an index.
The first will contain all indices from [0, mid)
(excluding
the index mid
itself) and the second will contain all
indices from [mid, len)
(excluding the index len
itself).
Panics
Panics if mid > len
.
Examples
let mut v = [1, 0, 3, 0, 5, 6]; // scoped to restrict the lifetime of the borrows { let (left, right) = v.split_at_mut(2); assert!(left == [1, 0]); assert!(right == [3, 0, 5, 6]); left[1] = 2; right[1] = 4; } assert!(v == [1, 2, 3, 4, 5, 6]);
pub fn split<F>(&self, pred: F) -> Split<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
. The matched element is not contained in the subslices.
Examples
let slice = [10, 40, 33, 20]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10, 40]); assert_eq!(iter.next().unwrap(), &[20]); assert!(iter.next().is_none());
If the first element is matched, an empty slice will be the first item returned by the iterator. Similarly, if the last element in the slice is matched, an empty slice will be the last item returned by the iterator:
let slice = [10, 40, 33]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10, 40]); assert_eq!(iter.next().unwrap(), &[]); assert!(iter.next().is_none());
If two matched elements are directly adjacent, an empty slice will be present between them:
let slice = [10, 6, 33, 20]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10]); assert_eq!(iter.next().unwrap(), &[]); assert_eq!(iter.next().unwrap(), &[20]); assert!(iter.next().is_none());
pub fn split_mut<F>(&mut self, pred: F) -> SplitMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over mutable subslices separated by elements that
match pred
. The matched element is not contained in the subslices.
Examples
let mut v = [10, 40, 30, 20, 60, 50]; for group in v.split_mut(|num| *num % 3 == 0) { group[0] = 1; } assert_eq!(v, [1, 40, 30, 1, 60, 1]);
pub fn rsplit<F>(&self, pred: F) -> RSplit<T, F> where
F: FnMut(&T) -> bool,
1.27.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
, starting at the end of the slice and working backwards.
The matched element is not contained in the subslices.
Examples
let slice = [11, 22, 33, 0, 44, 55]; let mut iter = slice.rsplit(|num| *num == 0); assert_eq!(iter.next().unwrap(), &[44, 55]); assert_eq!(iter.next().unwrap(), &[11, 22, 33]); assert_eq!(iter.next(), None);
As with split()
, if the first or last element is matched, an empty
slice will be the first (or last) item returned by the iterator.
let v = &[0, 1, 1, 2, 3, 5, 8]; let mut it = v.rsplit(|n| *n % 2 == 0); assert_eq!(it.next().unwrap(), &[]); assert_eq!(it.next().unwrap(), &[3, 5]); assert_eq!(it.next().unwrap(), &[1, 1]); assert_eq!(it.next().unwrap(), &[]); assert_eq!(it.next(), None);
pub fn rsplit_mut<F>(&mut self, pred: F) -> RSplitMut<T, F> where
F: FnMut(&T) -> bool,
1.27.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over mutable subslices separated by elements that
match pred
, starting at the end of the slice and working
backwards. The matched element is not contained in the subslices.
Examples
let mut v = [100, 400, 300, 200, 600, 500]; let mut count = 0; for group in v.rsplit_mut(|num| *num % 3 == 0) { count += 1; group[0] = count; } assert_eq!(v, [3, 400, 300, 2, 600, 1]);
pub fn splitn<F>(&self, n: usize, pred: F) -> SplitN<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
, limited to returning at most n
items. The matched element is
not contained in the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
Print the slice split once by numbers divisible by 3 (i.e., [10, 40]
,
[20, 60, 50]
):
let v = [10, 40, 30, 20, 60, 50]; for group in v.splitn(2, |num| *num % 3 == 0) { println!("{:?}", group); }
pub fn splitn_mut<F>(&mut self, n: usize, pred: F) -> SplitNMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
, limited to returning at most n
items. The matched element is
not contained in the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
let mut v = [10, 40, 30, 20, 60, 50]; for group in v.splitn_mut(2, |num| *num % 3 == 0) { group[0] = 1; } assert_eq!(v, [1, 40, 30, 1, 60, 50]);
pub fn rsplitn<F>(&self, n: usize, pred: F) -> RSplitN<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
limited to returning at most n
items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
Print the slice split once, starting from the end, by numbers divisible
by 3 (i.e., [50]
, [10, 40, 30, 20]
):
let v = [10, 40, 30, 20, 60, 50]; for group in v.rsplitn(2, |num| *num % 3 == 0) { println!("{:?}", group); }
pub fn rsplitn_mut<F>(&mut self, n: usize, pred: F) -> RSplitNMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0[src]
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
limited to returning at most n
items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
let mut s = [10, 40, 30, 20, 60, 50]; for group in s.rsplitn_mut(2, |num| *num % 3 == 0) { group[0] = 1; } assert_eq!(s, [1, 40, 30, 20, 60, 1]);
pub fn contains(&self, x: &T) -> bool where
T: PartialEq<T>,
1.0.0[src]
T: PartialEq<T>,
Returns true
if the slice contains an element with the given value.
Examples
let v = [10, 40, 30]; assert!(v.contains(&30)); assert!(!v.contains(&50));
pub fn starts_with(&self, needle: &[T]) -> bool where
T: PartialEq<T>,
1.0.0[src]
T: PartialEq<T>,
Returns true
if needle
is a prefix of the slice.
Examples
let v = [10, 40, 30]; assert!(v.starts_with(&[10])); assert!(v.starts_with(&[10, 40])); assert!(!v.starts_with(&[50])); assert!(!v.starts_with(&[10, 50]));
Always returns true
if needle
is an empty slice:
let v = &[10, 40, 30]; assert!(v.starts_with(&[])); let v: &[u8] = &[]; assert!(v.starts_with(&[]));
pub fn ends_with(&self, needle: &[T]) -> bool where
T: PartialEq<T>,
1.0.0[src]
T: PartialEq<T>,
Returns true
if needle
is a suffix of the slice.
Examples
let v = [10, 40, 30]; assert!(v.ends_with(&[30])); assert!(v.ends_with(&[40, 30])); assert!(!v.ends_with(&[50])); assert!(!v.ends_with(&[50, 30]));
Always returns true
if needle
is an empty slice:
let v = &[10, 40, 30]; assert!(v.ends_with(&[])); let v: &[u8] = &[]; assert!(v.ends_with(&[]));
pub fn binary_search(&self, x: &T) -> Result<usize, usize> where
T: Ord,
1.0.0[src]
T: Ord,
Binary searches this sorted slice for a given element.
If the value is found then [Result::Ok
] is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. If the value is not found then
[Result::Err
] is returned, containing the index where a matching
element could be inserted while maintaining sorted order.
Examples
Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in [1, 4]
.
let s = [0, 1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]; assert_eq!(s.binary_search(&13), Ok(9)); assert_eq!(s.binary_search(&4), Err(7)); assert_eq!(s.binary_search(&100), Err(13)); let r = s.binary_search(&1); assert!(match r { Ok(1..=4) => true, _ => false, });
pub fn binary_search_by<'a, F>(&'a self, f: F) -> Result<usize, usize> where
F: FnMut(&'a T) -> Ordering,
1.0.0[src]
F: FnMut(&'a T) -> Ordering,
Binary searches this sorted slice with a comparator function.
The comparator function should implement an order consistent
with the sort order of the underlying slice, returning an
order code that indicates whether its argument is Less
,
Equal
or Greater
the desired target.
If the value is found then [Result::Ok
] is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. If the value is not found then
[Result::Err
] is returned, containing the index where a matching
element could be inserted while maintaining sorted order.
Examples
Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in [1, 4]
.
let s = [0, 1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]; let seek = 13; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Ok(9)); let seek = 4; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Err(7)); let seek = 100; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Err(13)); let seek = 1; let r = s.binary_search_by(|probe| probe.cmp(&seek)); assert!(match r { Ok(1..=4) => true, _ => false, });
pub fn binary_search_by_key<'a, B, F>(
&'a self,
b: &B,
f: F
) -> Result<usize, usize> where
B: Ord,
F: FnMut(&'a T) -> B,
1.10.0[src]
&'a self,
b: &B,
f: F
) -> Result<usize, usize> where
B: Ord,
F: FnMut(&'a T) -> B,
Binary searches this sorted slice with a key extraction function.
Assumes that the slice is sorted by the key, for instance with
sort_by_key
using the same key extraction function.
If the value is found then [Result::Ok
] is returned, containing the
index of the matching element. If there are multiple matches, then any
one of the matches could be returned. If the value is not found then
[Result::Err
] is returned, containing the index where a matching
element could be inserted while maintaining sorted order.
Examples
Looks up a series of four elements in a slice of pairs sorted by
their second elements. The first is found, with a uniquely
determined position; the second and third are not found; the
fourth could match any position in [1, 4]
.
let s = [(0, 0), (2, 1), (4, 1), (5, 1), (3, 1), (1, 2), (2, 3), (4, 5), (5, 8), (3, 13), (1, 21), (2, 34), (4, 55)]; assert_eq!(s.binary_search_by_key(&13, |&(a,b)| b), Ok(9)); assert_eq!(s.binary_search_by_key(&4, |&(a,b)| b), Err(7)); assert_eq!(s.binary_search_by_key(&100, |&(a,b)| b), Err(13)); let r = s.binary_search_by_key(&1, |&(a,b)| b); assert!(match r { Ok(1..=4) => true, _ => false, });
pub fn sort_unstable(&mut self) where
T: Ord,
1.20.0[src]
T: Ord,
Sorts the slice, but may not preserve the order of equal elements.
This sort is unstable (i.e., may reorder equal elements), in-place
(i.e., does not allocate), and O(n log n)
worst-case.
Current implementation
The current algorithm is based on pattern-defeating quicksort by Orson Peters, which combines the fast average case of randomized quicksort with the fast worst case of heapsort, while achieving linear time on slices with certain patterns. It uses some randomization to avoid degenerate cases, but with a fixed seed to always provide deterministic behavior.
It is typically faster than stable sorting, except in a few special cases, e.g., when the slice consists of several concatenated sorted sequences.
Examples
let mut v = [-5, 4, 1, -3, 2]; v.sort_unstable(); assert!(v == [-5, -3, 1, 2, 4]);
pub fn sort_unstable_by<F>(&mut self, compare: F) where
F: FnMut(&T, &T) -> Ordering,
1.20.0[src]
F: FnMut(&T, &T) -> Ordering,
Sorts the slice with a comparator function, but may not preserve the order of equal elements.
This sort is unstable (i.e., may reorder equal elements), in-place
(i.e., does not allocate), and O(n log n)
worst-case.
The comparator function must define a total ordering for the elements in the slice. If the ordering is not total, the order of the elements is unspecified. An order is a total order if it is (for all a, b and c):
- total and antisymmetric: exactly one of a < b, a == b or a > b is true; and
- transitive, a < b and b < c implies a < c. The same must hold for both == and >.
For example, while f64
doesn't implement Ord
because NaN != NaN
, we can use
partial_cmp
as our sort function when we know the slice doesn't contain a NaN
.
let mut floats = [5f64, 4.0, 1.0, 3.0, 2.0]; floats.sort_by(|a, b| a.partial_cmp(b).unwrap()); assert_eq!(floats, [1.0, 2.0, 3.0, 4.0, 5.0]);
Current implementation
The current algorithm is based on pattern-defeating quicksort by Orson Peters, which combines the fast average case of randomized quicksort with the fast worst case of heapsort, while achieving linear time on slices with certain patterns. It uses some randomization to avoid degenerate cases, but with a fixed seed to always provide deterministic behavior.
It is typically faster than stable sorting, except in a few special cases, e.g., when the slice consists of several concatenated sorted sequences.
Examples
let mut v = [5, 4, 1, 3, 2]; v.sort_unstable_by(|a, b| a.cmp(b)); assert!(v == [1, 2, 3, 4, 5]); // reverse sorting v.sort_unstable_by(|a, b| b.cmp(a)); assert!(v == [5, 4, 3, 2, 1]);
pub fn sort_unstable_by_key<K, F>(&mut self, f: F) where
F: FnMut(&T) -> K,
K: Ord,
1.20.0[src]
F: FnMut(&T) -> K,
K: Ord,
Sorts the slice with a key extraction function, but may not preserve the order of equal elements.
This sort is unstable (i.e., may reorder equal elements), in-place
(i.e., does not allocate), and O(m n log(m n))
worst-case, where the key function is
O(m)
.
Current implementation
The current algorithm is based on pattern-defeating quicksort by Orson Peters, which combines the fast average case of randomized quicksort with the fast worst case of heapsort, while achieving linear time on slices with certain patterns. It uses some randomization to avoid degenerate cases, but with a fixed seed to always provide deterministic behavior.
Due to its key calling strategy, sort_unstable_by_key
is likely to be slower than sort_by_cached_key
in
cases where the key function is expensive.
Examples
let mut v = [-5i32, 4, 1, -3, 2]; v.sort_unstable_by_key(|k| k.abs()); assert!(v == [1, 2, -3, 4, -5]);
pub fn partition_at_index(
&mut self,
index: usize
) -> (&mut [T], &mut T, &mut [T]) where
T: Ord,
[src]
&mut self,
index: usize
) -> (&mut [T], &mut T, &mut [T]) where
T: Ord,
slice_partition_at_index
)Reorder the slice such that the element at index
is at its final sorted position.
This reordering has the additional property that any value at position i < index
will be
less than or equal to any value at a position j > index
. Additionally, this reordering is
unstable (i.e. any number of equal elements may end up at position index
), in-place
(i.e. does not allocate), and O(n)
worst-case. This function is also/ known as "kth
element" in other libraries. It returns a triplet of the following values: all elements less
than the one at the given index, the value at the given index, and all elements greater than
the one at the given index.
Current implementation
The current algorithm is based on the quickselect portion of the same quicksort algorithm
used for sort_unstable
.
Panics
Panics when index >= len()
, meaning it always panics on empty slices.
Examples
#![feature(slice_partition_at_index)] let mut v = [-5i32, 4, 1, -3, 2]; // Find the median v.partition_at_index(2); // We are only guaranteed the slice will be one of the following, based on the way we sort // about the specified index. assert!(v == [-3, -5, 1, 2, 4] || v == [-5, -3, 1, 2, 4] || v == [-3, -5, 1, 4, 2] || v == [-5, -3, 1, 4, 2]);
pub fn partition_at_index_by<F>(
&mut self,
index: usize,
compare: F
) -> (&mut [T], &mut T, &mut [T]) where
F: FnMut(&T, &T) -> Ordering,
[src]
&mut self,
index: usize,
compare: F
) -> (&mut [T], &mut T, &mut [T]) where
F: FnMut(&T, &T) -> Ordering,
slice_partition_at_index
)Reorder the slice with a comparator function such that the element at index
is at its
final sorted position.
This reordering has the additional property that any value at position i < index
will be
less than or equal to any value at a position j > index
using the comparator function.
Additionally, this reordering is unstable (i.e. any number of equal elements may end up at
position index
), in-place (i.e. does not allocate), and O(n)
worst-case. This function
is also known as "kth element" in other libraries. It returns a triplet of the following
values: all elements less than the one at the given index, the value at the given index,
and all elements greater than the one at the given index, using the provided comparator
function.
Current implementation
The current algorithm is based on the quickselect portion of the same quicksort algorithm
used for sort_unstable
.
Panics
Panics when index >= len()
, meaning it always panics on empty slices.
Examples
#![feature(slice_partition_at_index)] let mut v = [-5i32, 4, 1, -3, 2]; // Find the median as if the slice were sorted in descending order. v.partition_at_index_by(2, |a, b| b.cmp(a)); // We are only guaranteed the slice will be one of the following, based on the way we sort // about the specified index. assert!(v == [2, 4, 1, -5, -3] || v == [2, 4, 1, -3, -5] || v == [4, 2, 1, -5, -3] || v == [4, 2, 1, -3, -5]);
pub fn partition_at_index_by_key<K, F>(
&mut self,
index: usize,
f: F
) -> (&mut [T], &mut T, &mut [T]) where
F: FnMut(&T) -> K,
K: Ord,
[src]
&mut self,
index: usize,
f: F
) -> (&mut [T], &mut T, &mut [T]) where
F: FnMut(&T) -> K,
K: Ord,
slice_partition_at_index
)Reorder the slice with a key extraction function such that the element at index
is at its
final sorted position.
This reordering has the additional property that any value at position i < index
will be
less than or equal to any value at a position j > index
using the key extraction function.
Additionally, this reordering is unstable (i.e. any number of equal elements may end up at
position index
), in-place (i.e. does not allocate), and O(n)
worst-case. This function
is also known as "kth element" in other libraries. It returns a triplet of the following
values: all elements less than the one at the given index, the value at the given index, and
all elements greater than the one at the given index, using the provided key extraction
function.
Current implementation
The current algorithm is based on the quickselect portion of the same quicksort algorithm
used for sort_unstable
.
Panics
Panics when index >= len()
, meaning it always panics on empty slices.
Examples
#![feature(slice_partition_at_index)] let mut v = [-5i32, 4, 1, -3, 2]; // Return the median as if the array were sorted according to absolute value. v.partition_at_index_by_key(2, |a| a.abs()); // We are only guaranteed the slice will be one of the following, based on the way we sort // about the specified index. assert!(v == [1, 2, -3, 4, -5] || v == [1, 2, -3, -5, 4] || v == [2, 1, -3, 4, -5] || v == [2, 1, -3, -5, 4]);
pub fn partition_dedup(&mut self) -> (&mut [T], &mut [T]) where
T: PartialEq<T>,
[src]
T: PartialEq<T>,
slice_partition_dedup
)Moves all consecutive repeated elements to the end of the slice according to the
PartialEq
trait implementation.
Returns two slices. The first contains no consecutive repeated elements. The second contains all the duplicates in no specified order.
If the slice is sorted, the first returned slice contains no duplicates.
Examples
#![feature(slice_partition_dedup)] let mut slice = [1, 2, 2, 3, 3, 2, 1, 1]; let (dedup, duplicates) = slice.partition_dedup(); assert_eq!(dedup, [1, 2, 3, 2, 1]); assert_eq!(duplicates, [2, 3, 1]);
pub fn partition_dedup_by<F>(&mut self, same_bucket: F) -> (&mut [T], &mut [T]) where
F: FnMut(&mut T, &mut T) -> bool,
[src]
F: FnMut(&mut T, &mut T) -> bool,
slice_partition_dedup
)Moves all but the first of consecutive elements to the end of the slice satisfying a given equality relation.
Returns two slices. The first contains no consecutive repeated elements. The second contains all the duplicates in no specified order.
The same_bucket
function is passed references to two elements from the slice and
must determine if the elements compare equal. The elements are passed in opposite order
from their order in the slice, so if same_bucket(a, b)
returns true
, a
is moved
at the end of the slice.
If the slice is sorted, the first returned slice contains no duplicates.
Examples
#![feature(slice_partition_dedup)] let mut slice = ["foo", "Foo", "BAZ", "Bar", "bar", "baz", "BAZ"]; let (dedup, duplicates) = slice.partition_dedup_by(|a, b| a.eq_ignore_ascii_case(b)); assert_eq!(dedup, ["foo", "BAZ", "Bar", "baz"]); assert_eq!(duplicates, ["bar", "Foo", "BAZ"]);
pub fn partition_dedup_by_key<K, F>(&mut self, key: F) -> (&mut [T], &mut [T]) where
F: FnMut(&mut T) -> K,
K: PartialEq<K>,
[src]
F: FnMut(&mut T) -> K,
K: PartialEq<K>,
slice_partition_dedup
)Moves all but the first of consecutive elements to the end of the slice that resolve to the same key.
Returns two slices. The first contains no consecutive repeated elements. The second contains all the duplicates in no specified order.
If the slice is sorted, the first returned slice contains no duplicates.
Examples
#![feature(slice_partition_dedup)] let mut slice = [10, 20, 21, 30, 30, 20, 11, 13]; let (dedup, duplicates) = slice.partition_dedup_by_key(|i| *i / 10); assert_eq!(dedup, [10, 20, 30, 20, 11]); assert_eq!(duplicates, [21, 30, 13]);
pub fn rotate_left(&mut self, mid: usize)
1.26.0[src]
Rotates the slice in-place such that the first mid
elements of the
slice move to the end while the last self.len() - mid
elements move to
the front. After calling rotate_left
, the element previously at index
mid
will become the first element in the slice.
Panics
This function will panic if mid
is greater than the length of the
slice. Note that mid == self.len()
does not panic and is a no-op
rotation.
Complexity
Takes linear (in self.len()
) time.
Examples
let mut a = ['a', 'b', 'c', 'd', 'e', 'f']; a.rotate_left(2); assert_eq!(a, ['c', 'd', 'e', 'f', 'a', 'b']);
Rotating a subslice:
let mut a = ['a', 'b', 'c', 'd', 'e', 'f']; a[1..5].rotate_left(1); assert_eq!(a, ['a', 'c', 'd', 'e', 'b', 'f']);
pub fn rotate_right(&mut self, k: usize)
1.26.0[src]
Rotates the slice in-place such that the first self.len() - k
elements of the slice move to the end while the last k
elements move
to the front. After calling rotate_right
, the element previously at
index self.len() - k
will become the first element in the slice.
Panics
This function will panic if k
is greater than the length of the
slice. Note that k == self.len()
does not panic and is a no-op
rotation.
Complexity
Takes linear (in self.len()
) time.
Examples
let mut a = ['a', 'b', 'c', 'd', 'e', 'f']; a.rotate_right(2); assert_eq!(a, ['e', 'f', 'a', 'b', 'c', 'd']);
Rotate a subslice:
let mut a = ['a', 'b', 'c', 'd', 'e', 'f']; a[1..5].rotate_right(1); assert_eq!(a, ['a', 'e', 'b', 'c', 'd', 'f']);
pub fn clone_from_slice(&mut self, src: &[T]) where
T: Clone,
1.7.0[src]
T: Clone,
Copies the elements from src
into self
.
The length of src
must be the same as self
.
If src
implements Copy
, it can be more performant to use
copy_from_slice
.
Panics
This function will panic if the two slices have different lengths.
Examples
Cloning two elements from a slice into another:
let src = [1, 2, 3, 4]; let mut dst = [0, 0]; // Because the slices have to be the same length, // we slice the source slice from four elements // to two. It will panic if we don't do this. dst.clone_from_slice(&src[2..]); assert_eq!(src, [1, 2, 3, 4]); assert_eq!(dst, [3, 4]);
Rust enforces that there can only be one mutable reference with no
immutable references to a particular piece of data in a particular
scope. Because of this, attempting to use clone_from_slice
on a
single slice will result in a compile failure:
let mut slice = [1, 2, 3, 4, 5]; slice[..2].clone_from_slice(&slice[3..]); // compile fail!
To work around this, we can use split_at_mut
to create two distinct
sub-slices from a slice:
let mut slice = [1, 2, 3, 4, 5]; { let (left, right) = slice.split_at_mut(2); left.clone_from_slice(&right[1..]); } assert_eq!(slice, [4, 5, 3, 4, 5]);
pub fn copy_from_slice(&mut self, src: &[T]) where
T: Copy,
1.9.0[src]
T: Copy,
Copies all elements from src
into self
, using a memcpy.
The length of src
must be the same as self
.
If src
does not implement Copy
, use clone_from_slice
.
Panics
This function will panic if the two slices have different lengths.
Examples
Copying two elements from a slice into another:
let src = [1, 2, 3, 4]; let mut dst = [0, 0]; // Because the slices have to be the same length, // we slice the source slice from four elements // to two. It will panic if we don't do this. dst.copy_from_slice(&src[2..]); assert_eq!(src, [1, 2, 3, 4]); assert_eq!(dst, [3, 4]);
Rust enforces that there can only be one mutable reference with no
immutable references to a particular piece of data in a particular
scope. Because of this, attempting to use copy_from_slice
on a
single slice will result in a compile failure:
let mut slice = [1, 2, 3, 4, 5]; slice[..2].copy_from_slice(&slice[3..]); // compile fail!
To work around this, we can use split_at_mut
to create two distinct
sub-slices from a slice:
let mut slice = [1, 2, 3, 4, 5]; { let (left, right) = slice.split_at_mut(2); left.copy_from_slice(&right[1..]); } assert_eq!(slice, [4, 5, 3, 4, 5]);
pub fn copy_within<R>(&mut self, src: R, dest: usize) where
R: RangeBounds<usize>,
T: Copy,
1.37.0[src]
R: RangeBounds<usize>,
T: Copy,
Copies elements from one part of the slice to another part of itself, using a memmove.
src
is the range within self
to copy from. dest
is the starting
index of the range within self
to copy to, which will have the same
length as src
. The two ranges may overlap. The ends of the two ranges
must be less than or equal to self.len()
.
Panics
This function will panic if either range exceeds the end of the slice,
or if the end of src
is before the start.
Examples
Copying four bytes within a slice:
let mut bytes = *b"Hello, World!"; bytes.copy_within(1..5, 8); assert_eq!(&bytes, b"Hello, Wello!");
pub fn swap_with_slice(&mut self, other: &mut [T])
1.27.0[src]
Swaps all elements in self
with those in other
.
The length of other
must be the same as self
.
Panics
This function will panic if the two slices have different lengths.
Example
Swapping two elements across slices:
let mut slice1 = [0, 0]; let mut slice2 = [1, 2, 3, 4]; slice1.swap_with_slice(&mut slice2[2..]); assert_eq!(slice1, [3, 4]); assert_eq!(slice2, [1, 2, 0, 0]);
Rust enforces that there can only be one mutable reference to a
particular piece of data in a particular scope. Because of this,
attempting to use swap_with_slice
on a single slice will result in
a compile failure:
let mut slice = [1, 2, 3, 4, 5]; slice[..2].swap_with_slice(&mut slice[3..]); // compile fail!
To work around this, we can use split_at_mut
to create two distinct
mutable sub-slices from a slice:
let mut slice = [1, 2, 3, 4, 5]; { let (left, right) = slice.split_at_mut(2); left.swap_with_slice(&mut right[1..]); } assert_eq!(slice, [4, 5, 3, 1, 2]);
pub unsafe fn align_to<U>(&self) -> (&[T], &[U], &[T])
1.30.0[src]
Transmute the slice to a slice of another type, ensuring alignment of the types is maintained.
This method splits the slice into three distinct slices: prefix, correctly aligned middle slice of a new type, and the suffix slice. The method does a best effort to make the middle slice the greatest length possible for a given type and input slice, but only your algorithm's performance should depend on that, not its correctness.
This method has no purpose when either input element T
or output element U
are
zero-sized and will return the original slice without splitting anything.
Safety
This method is essentially a transmute
with respect to the elements in the returned
middle slice, so all the usual caveats pertaining to transmute::<T, U>
also apply here.
Examples
Basic usage:
unsafe { let bytes: [u8; 7] = [1, 2, 3, 4, 5, 6, 7]; let (prefix, shorts, suffix) = bytes.align_to::<u16>(); // less_efficient_algorithm_for_bytes(prefix); // more_efficient_algorithm_for_aligned_shorts(shorts); // less_efficient_algorithm_for_bytes(suffix); }
pub unsafe fn align_to_mut<U>(&mut self) -> (&mut [T], &mut [U], &mut [T])
1.30.0[src]
Transmute the slice to a slice of another type, ensuring alignment of the types is maintained.
This method splits the slice into three distinct slices: prefix, correctly aligned middle slice of a new type, and the suffix slice. The method does a best effort to make the middle slice the greatest length possible for a given type and input slice, but only your algorithm's performance should depend on that, not its correctness.
This method has no purpose when either input element T
or output element U
are
zero-sized and will return the original slice without splitting anything.
Safety
This method is essentially a transmute
with respect to the elements in the returned
middle slice, so all the usual caveats pertaining to transmute::<T, U>
also apply here.
Examples
Basic usage:
unsafe { let mut bytes: [u8; 7] = [1, 2, 3, 4, 5, 6, 7]; let (prefix, shorts, suffix) = bytes.align_to_mut::<u16>(); // less_efficient_algorithm_for_bytes(prefix); // more_efficient_algorithm_for_aligned_shorts(shorts); // less_efficient_algorithm_for_bytes(suffix); }
pub fn is_sorted(&self) -> bool where
T: PartialOrd<T>,
[src]
T: PartialOrd<T>,
🔬 This is a nightly-only experimental API. (is_sorted
)
new API
Checks if the elements of this slice are sorted.
That is, for each element a
and its following element b
, a <= b
must hold. If the
slice yields exactly zero or one element, true
is returned.
Note that if Self::Item
is only PartialOrd
, but not Ord
, the above definition
implies that this function returns false
if any two consecutive items are not
comparable.
Examples
#![feature(is_sorted)] let empty: [i32; 0] = []; assert!([1, 2, 2, 9].is_sorted()); assert!(![1, 3, 2, 4].is_sorted()); assert!([0].is_sorted()); assert!(empty.is_sorted()); assert!(![0.0, 1.0, std::f32::NAN].is_sorted());
pub fn is_sorted_by<F>(&self, compare: F) -> bool where
F: FnMut(&T, &T) -> Option<Ordering>,
[src]
F: FnMut(&T, &T) -> Option<Ordering>,
🔬 This is a nightly-only experimental API. (is_sorted
)
new API
Checks if the elements of this slice are sorted using the given comparator function.
Instead of using PartialOrd::partial_cmp
, this function uses the given compare
function to determine the ordering of two elements. Apart from that, it's equivalent to
is_sorted
; see its documentation for more information.
pub fn is_sorted_by_key<F, K>(&self, f: F) -> bool where
F: FnMut(&T) -> K,
K: PartialOrd<K>,
[src]
F: FnMut(&T) -> K,
K: PartialOrd<K>,
🔬 This is a nightly-only experimental API. (is_sorted
)
new API
Checks if the elements of this slice are sorted using the given key extraction function.
Instead of comparing the slice's elements directly, this function compares the keys of the
elements, as determined by f
. Apart from that, it's equivalent to is_sorted
; see its
documentation for more information.
Examples
#![feature(is_sorted)] assert!(["c", "bb", "aaa"].is_sorted_by_key(|s| s.len())); assert!(![-2i32, -1, 0, 3].is_sorted_by_key(|n| n.abs()));
pub fn is_ascii(&self) -> bool
1.23.0[src]
Checks if all bytes in this slice are within the ASCII range.
pub fn eq_ignore_ascii_case(&self, other: &[u8]) -> bool
1.23.0[src]
Checks that two slices are an ASCII case-insensitive match.
Same as to_ascii_lowercase(a) == to_ascii_lowercase(b)
,
but without allocating and copying temporaries.
pub fn make_ascii_uppercase(&mut self)
1.23.0[src]
Converts this slice to its ASCII upper case equivalent in-place.
ASCII letters 'a' to 'z' are mapped to 'A' to 'Z', but non-ASCII letters are unchanged.
To return a new uppercased value without modifying the existing one, use
to_ascii_uppercase
.
pub fn make_ascii_lowercase(&mut self)
1.23.0[src]
Converts this slice to its ASCII lower case equivalent in-place.
ASCII letters 'A' to 'Z' are mapped to 'a' to 'z', but non-ASCII letters are unchanged.
To return a new lowercased value without modifying the existing one, use
to_ascii_lowercase
.
pub fn sort(&mut self) where
T: Ord,
1.0.0[src]
T: Ord,
Sorts the slice.
This sort is stable (i.e., does not reorder equal elements) and O(n log n)
worst-case.
When applicable, unstable sorting is preferred because it is generally faster than stable
sorting and it doesn't allocate auxiliary memory.
See sort_unstable
.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [-5, 4, 1, -3, 2]; v.sort(); assert!(v == [-5, -3, 1, 2, 4]);
pub fn sort_by<F>(&mut self, compare: F) where
F: FnMut(&T, &T) -> Ordering,
1.0.0[src]
F: FnMut(&T, &T) -> Ordering,
Sorts the slice with a comparator function.
This sort is stable (i.e., does not reorder equal elements) and O(n log n)
worst-case.
The comparator function must define a total ordering for the elements in the slice. If
the ordering is not total, the order of the elements is unspecified. An order is a
total order if it is (for all a
, b
and c
):
- total and antisymmetric: exactly one of
a < b
,a == b
ora > b
is true, and - transitive,
a < b
andb < c
impliesa < c
. The same must hold for both==
and>
.
For example, while f64
doesn't implement Ord
because NaN != NaN
, we can use
partial_cmp
as our sort function when we know the slice doesn't contain a NaN
.
let mut floats = [5f64, 4.0, 1.0, 3.0, 2.0]; floats.sort_by(|a, b| a.partial_cmp(b).unwrap()); assert_eq!(floats, [1.0, 2.0, 3.0, 4.0, 5.0]);
When applicable, unstable sorting is preferred because it is generally faster than stable
sorting and it doesn't allocate auxiliary memory.
See sort_unstable_by
.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [5, 4, 1, 3, 2]; v.sort_by(|a, b| a.cmp(b)); assert!(v == [1, 2, 3, 4, 5]); // reverse sorting v.sort_by(|a, b| b.cmp(a)); assert!(v == [5, 4, 3, 2, 1]);
pub fn sort_by_key<K, F>(&mut self, f: F) where
F: FnMut(&T) -> K,
K: Ord,
1.7.0[src]
F: FnMut(&T) -> K,
K: Ord,
Sorts the slice with a key extraction function.
This sort is stable (i.e., does not reorder equal elements) and O(m n log(m n))
worst-case, where the key function is O(m)
.
For expensive key functions (e.g. functions that are not simple property accesses or
basic operations), sort_by_cached_key
is likely to be
significantly faster, as it does not recompute element keys.
When applicable, unstable sorting is preferred because it is generally faster than stable
sorting and it doesn't allocate auxiliary memory.
See sort_unstable_by_key
.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [-5i32, 4, 1, -3, 2]; v.sort_by_key(|k| k.abs()); assert!(v == [1, 2, -3, 4, -5]);
pub fn sort_by_cached_key<K, F>(&mut self, f: F) where
F: FnMut(&T) -> K,
K: Ord,
1.34.0[src]
F: FnMut(&T) -> K,
K: Ord,
Sorts the slice with a key extraction function.
During sorting, the key function is called only once per element.
This sort is stable (i.e., does not reorder equal elements) and O(m n + n log n)
worst-case, where the key function is O(m)
.
For simple key functions (e.g., functions that are property accesses or
basic operations), sort_by_key
is likely to be
faster.
Current implementation
The current algorithm is based on pattern-defeating quicksort by Orson Peters, which combines the fast average case of randomized quicksort with the fast worst case of heapsort, while achieving linear time on slices with certain patterns. It uses some randomization to avoid degenerate cases, but with a fixed seed to always provide deterministic behavior.
In the worst case, the algorithm allocates temporary storage in a Vec<(K, usize)>
the
length of the slice.
Examples
let mut v = [-5i32, 4, 32, -3, 2]; v.sort_by_cached_key(|k| k.to_string()); assert!(v == [-3, -5, 2, 32, 4]);
pub fn to_vec(&self) -> Vec<T> where
T: Clone,
1.0.0[src]
T: Clone,
Copies self
into a new Vec
.
Examples
let s = [10, 40, 30]; let x = s.to_vec(); // Here, `s` and `x` can be modified independently.
pub fn repeat(&self, n: usize) -> Vec<T> where
T: Copy,
[src]
T: Copy,
🔬 This is a nightly-only experimental API. (repeat_generic_slice
)
it's on str, why not on slice?
Creates a vector by repeating a slice n
times.
Panics
This function will panic if the capacity would overflow.
Examples
Basic usage:
#![feature(repeat_generic_slice)] fn main() { assert_eq!([1, 2].repeat(3), vec![1, 2, 1, 2, 1, 2]); }
A panic upon overflow:
#![feature(repeat_generic_slice)] fn main() { // this will panic at runtime b"0123456789abcdef".repeat(usize::max_value()); }
pub fn concat<Separator>(&self) -> <T as SliceConcat<Separator>>::Output where
Separator: ?Sized,
T: SliceConcat<Separator>,
1.0.0[src]
Separator: ?Sized,
T: SliceConcat<Separator>,
Flattens a slice of T
into a single value Self::Output
.
Examples
assert_eq!(["hello", "world"].concat(), "helloworld"); assert_eq!([[1, 2], [3, 4]].concat(), [1, 2, 3, 4]);
pub fn join<Separator>(
&self,
sep: &Separator
) -> <T as SliceConcat<Separator>>::Output where
Separator: ?Sized,
T: SliceConcat<Separator>,
1.3.0[src]
&self,
sep: &Separator
) -> <T as SliceConcat<Separator>>::Output where
Separator: ?Sized,
T: SliceConcat<Separator>,
Flattens a slice of T
into a single value Self::Output
, placing a
given separator between each.
Examples
assert_eq!(["hello", "world"].join(" "), "hello world"); assert_eq!([[1, 2], [3, 4]].join(&0), [1, 2, 0, 3, 4]);
pub fn connect<Separator>(
&self,
sep: &Separator
) -> <T as SliceConcat<Separator>>::Output where
Separator: ?Sized,
T: SliceConcat<Separator>,
1.0.0[src]
&self,
sep: &Separator
) -> <T as SliceConcat<Separator>>::Output where
Separator: ?Sized,
T: SliceConcat<Separator>,
renamed to join
Flattens a slice of T
into a single value Self::Output
, placing a
given separator between each.
Examples
assert_eq!(["hello", "world"].connect(" "), "hello world"); assert_eq!([[1, 2], [3, 4]].connect(&0), [1, 2, 0, 3, 4]);
pub fn to_ascii_uppercase(&self) -> Vec<u8>
1.23.0[src]
Returns a vector containing a copy of this slice where each byte is mapped to its ASCII upper case equivalent.
ASCII letters 'a' to 'z' are mapped to 'A' to 'Z', but non-ASCII letters are unchanged.
To uppercase the value in-place, use make_ascii_uppercase
.
pub fn to_ascii_lowercase(&self) -> Vec<u8>
1.23.0[src]
Returns a vector containing a copy of this slice where each byte is mapped to its ASCII lower case equivalent.
ASCII letters 'A' to 'Z' are mapped to 'a' to 'z', but non-ASCII letters are unchanged.
To lowercase the value in-place, use make_ascii_lowercase
.
Trait Implementations
impl From<BytesMut> for Response<Body>
[src]
impl From<BytesMut> for Body
[src]
impl MessageBody for BytesMut
[src]
impl<'a> Extend<&'a u8> for BytesMut
[src]
fn extend<T>(&mut self, iter: T) where
T: IntoIterator<Item = &'a u8>,
[src]
T: IntoIterator<Item = &'a u8>,
impl Extend<u8> for BytesMut
[src]
fn extend<T>(&mut self, iter: T) where
T: IntoIterator<Item = u8>,
[src]
T: IntoIterator<Item = u8>,
impl Default for BytesMut
[src]
impl IntoIterator for BytesMut
[src]
type Item = u8
The type of the elements being iterated over.
type IntoIter = Iter<Cursor<BytesMut>>
Which kind of iterator are we turning this into?
fn into_iter(self) -> <BytesMut as IntoIterator>::IntoIter
[src]
impl<'a> IntoIterator for &'a BytesMut
[src]
type Item = u8
The type of the elements being iterated over.
type IntoIter = Iter<Cursor<&'a BytesMut>>
Which kind of iterator are we turning this into?
fn into_iter(self) -> <&'a BytesMut as IntoIterator>::IntoIter
[src]
impl Ord for BytesMut
[src]
fn cmp(&self, other: &BytesMut) -> Ordering
[src]
fn max(self, other: Self) -> Self
1.21.0[src]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
Compares and returns the minimum of two values. Read more
fn clamp(self, min: Self, max: Self) -> Self
[src]
clamp
)Restrict a value to a certain interval. Read more
impl BufMut for BytesMut
[src]
fn remaining_mut(&self) -> usize
[src]
unsafe fn advance_mut(&mut self, cnt: usize)
[src]
unsafe fn bytes_mut(&mut self) -> &mut [u8]
[src]
fn put_slice(&mut self, src: &[u8])
[src]
fn put_u8(&mut self, n: u8)
[src]
fn put_i8(&mut self, n: i8)
[src]
fn has_remaining_mut(&self) -> bool
[src]
Returns true if there is space in self
for more bytes. Read more
unsafe fn bytes_vec_mut(&'a mut self, dst: &mut [&'a mut IoVec]) -> usize
[src]
Fills dst
with potentially multiple mutable slices starting at self
's current position. Read more
fn put<T>(&mut self, src: T) where
T: IntoBuf,
[src]
T: IntoBuf,
Transfer bytes into self
from src
and advance the cursor by the number of bytes written. Read more
fn put_u16_be(&mut self, n: u16)
[src]
Writes an unsigned 16 bit integer to self
in big-endian byte order. Read more
fn put_u16_le(&mut self, n: u16)
[src]
Writes an unsigned 16 bit integer to self
in little-endian byte order. Read more
fn put_i16_be(&mut self, n: i16)
[src]
Writes a signed 16 bit integer to self
in big-endian byte order. Read more
fn put_i16_le(&mut self, n: i16)
[src]
Writes a signed 16 bit integer to self
in little-endian byte order. Read more
fn put_u32_be(&mut self, n: u32)
[src]
Writes an unsigned 32 bit integer to self
in big-endian byte order. Read more
fn put_u32_le(&mut self, n: u32)
[src]
Writes an unsigned 32 bit integer to self
in little-endian byte order. Read more
fn put_i32_be(&mut self, n: i32)
[src]
Writes a signed 32 bit integer to self
in big-endian byte order. Read more
fn put_i32_le(&mut self, n: i32)
[src]
Writes a signed 32 bit integer to self
in little-endian byte order. Read more
fn put_u64_be(&mut self, n: u64)
[src]
Writes an unsigned 64 bit integer to self
in the big-endian byte order. Read more
fn put_u64_le(&mut self, n: u64)
[src]
Writes an unsigned 64 bit integer to self
in little-endian byte order. Read more
fn put_i64_be(&mut self, n: i64)
[src]
Writes a signed 64 bit integer to self
in the big-endian byte order. Read more
fn put_i64_le(&mut self, n: i64)
[src]
Writes a signed 64 bit integer to self
in little-endian byte order. Read more
fn put_uint_be(&mut self, n: u64, nbytes: usize)
[src]
Writes an unsigned n-byte integer to self
in big-endian byte order. Read more
fn put_uint_le(&mut self, n: u64, nbytes: usize)
[src]
Writes an unsigned n-byte integer to self
in the little-endian byte order. Read more
fn put_int_be(&mut self, n: i64, nbytes: usize)
[src]
Writes a signed n-byte integer to self
in big-endian byte order. Read more
fn put_int_le(&mut self, n: i64, nbytes: usize)
[src]
Writes a signed n-byte integer to self
in little-endian byte order. Read more
fn put_f32_be(&mut self, n: f32)
[src]
Writes an IEEE754 single-precision (4 bytes) floating point number to self
in big-endian byte order. Read more
fn put_f32_le(&mut self, n: f32)
[src]
Writes an IEEE754 single-precision (4 bytes) floating point number to self
in little-endian byte order. Read more
fn put_f64_be(&mut self, n: f64)
[src]
Writes an IEEE754 double-precision (8 bytes) floating point number to self
in big-endian byte order. Read more
fn put_f64_le(&mut self, n: f64)
[src]
Writes an IEEE754 double-precision (8 bytes) floating point number to self
in little-endian byte order. Read more
fn by_ref(&mut self) -> &mut Self
[src]
Creates a "by reference" adaptor for this instance of BufMut
. Read more
fn writer(self) -> Writer<Self>
[src]
Creates an adaptor which implements the Write
trait for self
. Read more
impl DerefMut for BytesMut
[src]
impl<'a, T> PartialEq<&'a T> for BytesMut where
T: ?Sized,
BytesMut: PartialEq<T>,
[src]
T: ?Sized,
BytesMut: PartialEq<T>,
fn eq(&self, other: &&'a T) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<[u8]> for BytesMut
[src]
fn eq(&self, other: &[u8]) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<str> for BytesMut
[src]
fn eq(&self, other: &str) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<Vec<u8>> for BytesMut
[src]
fn eq(&self, other: &Vec<u8>) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<BytesMut> for Bytes
[src]
fn eq(&self, other: &BytesMut) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<String> for BytesMut
[src]
fn eq(&self, other: &String) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<BytesMut> for Vec<u8>
[src]
fn eq(&self, other: &BytesMut) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<BytesMut> for [u8]
[src]
fn eq(&self, other: &BytesMut) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<Bytes> for BytesMut
[src]
fn eq(&self, other: &Bytes) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl<'a> PartialEq<BytesMut> for &'a [u8]
[src]
fn eq(&self, other: &BytesMut) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<BytesMut> for BytesMut
[src]
fn eq(&self, other: &BytesMut) -> bool
[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl AsMut<[u8]> for BytesMut
[src]
impl Deref for BytesMut
[src]
impl PartialOrd<String> for BytesMut
[src]
fn partial_cmp(&self, other: &String) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<BytesMut> for [u8]
[src]
fn partial_cmp(&self, other: &BytesMut) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<str> for BytesMut
[src]
fn partial_cmp(&self, other: &str) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<BytesMut> for BytesMut
[src]
fn partial_cmp(&self, other: &BytesMut) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<Vec<u8>> for BytesMut
[src]
fn partial_cmp(&self, other: &Vec<u8>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl<'a> PartialOrd<BytesMut> for &'a [u8]
[src]
fn partial_cmp(&self, other: &BytesMut) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl<'a, T> PartialOrd<&'a T> for BytesMut where
T: ?Sized,
BytesMut: PartialOrd<T>,
[src]
T: ?Sized,
BytesMut: PartialOrd<T>,
fn partial_cmp(&self, other: &&'a T) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<BytesMut> for Vec<u8>
[src]
fn partial_cmp(&self, other: &BytesMut) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialOrd<[u8]> for BytesMut
[src]
fn partial_cmp(&self, other: &[u8]) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl Hash for BytesMut
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl FromBuf for BytesMut
[src]
impl<'a> FromIterator<&'a u8> for BytesMut
[src]
fn from_iter<T>(into_iter: T) -> BytesMut where
T: IntoIterator<Item = &'a u8>,
[src]
T: IntoIterator<Item = &'a u8>,
impl FromIterator<u8> for BytesMut
[src]
fn from_iter<T>(into_iter: T) -> BytesMut where
T: IntoIterator<Item = u8>,
[src]
T: IntoIterator<Item = u8>,
impl<'a> IntoBuf for &'a BytesMut
[src]
type Buf = Cursor<&'a BytesMut>
The Buf
type that self
is being converted into
fn into_buf(self) -> <&'a BytesMut as IntoBuf>::Buf
[src]
impl IntoBuf for BytesMut
[src]
type Buf = Cursor<BytesMut>
The Buf
type that self
is being converted into
fn into_buf(self) -> <BytesMut as IntoBuf>::Buf
[src]
impl Clone for BytesMut
[src]
fn clone(&self) -> BytesMut
[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Eq for BytesMut
[src]
impl Debug for BytesMut
[src]
impl Write for BytesMut
[src]
fn write_str(&mut self, s: &str) -> Result<(), Error>
[src]
fn write_fmt(&mut self, args: Arguments) -> Result<(), Error>
[src]
fn write_char(&mut self, c: char) -> Result<(), Error>
1.1.0[src]
Writes a [char
] into this writer, returning whether the write succeeded. Read more
impl Borrow<[u8]> for BytesMut
[src]
impl AsRef<[u8]> for BytesMut
[src]
impl From<String> for BytesMut
[src]
impl<'a> From<&'a str> for BytesMut
[src]
impl From<BytesMut> for Bytes
[src]
impl From<Bytes> for BytesMut
[src]
impl<'a> From<&'a [u8]> for BytesMut
[src]
impl From<Vec<u8>> for BytesMut
[src]
impl BorrowMut<[u8]> for BytesMut
[src]
impl StableAsRef for BytesMut
[src]
impl Responder for BytesMut
[src]
type Error = Error
The associated error which can be returned.
type Future = FutureResult<Response, Error>
The future response value.
fn respond_to(self, _: &HttpRequest) -> Self::Future
[src]
fn with_status(self, status: StatusCode) -> CustomResponder<Self> where
Self: Sized,
[src]
Self: Sized,
Override a status code for a Responder. Read more
fn with_header<K, V>(self, key: K, value: V) -> CustomResponder<Self> where
Self: Sized,
HeaderName: HttpTryFrom<K>,
V: IntoHeaderValue,
[src]
Self: Sized,
HeaderName: HttpTryFrom<K>,
V: IntoHeaderValue,
Add header to the Responder's response. Read more
Auto Trait Implementations
impl Unpin for BytesMut
impl Sync for BytesMut
impl Send for BytesMut
impl RefUnwindSafe for BytesMut
impl UnwindSafe for BytesMut
Blanket Implementations
impl<T> From<T> for T
[src]
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
[src]
fn clone_into(&self, target: &mut T)
[src]
impl<I> IntoIterator for I where
I: Iterator,
[src]
I: Iterator,
type Item = <I as Iterator>::Item
The type of the elements being iterated over.
type IntoIter = I
Which kind of iterator are we turning this into?
fn into_iter(self) -> I
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T, V> SliceConcat<T> for V where
T: Clone,
V: Borrow<[T]>,
[src]
T: Clone,
V: Borrow<[T]>,
type Output = Vec<T>
slice_concat_trait
)The resulting type after concatenation
fn concat(slice: &[V]) -> Vec<T>
[src]
fn join(slice: &[V], sep: &T) -> Vec<T>
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> IntoBuf for T where
T: Buf,
[src]
T: Buf,
impl<Q, K> Equivalent<K> for Q where
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
[src]
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
fn equivalent(&self, key: &K) -> bool
[src]
impl<T> Erased for T
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,