Function malachite_base::iterators::is_constant

pub fn is_constant<I: Iterator>(xs: I) -> bool
where
    I::Item: Eq,

Returns whether all of the values generated by an iterator are equal.

is_constant(xs) is equivalent to xs.unique().count() == 1 for finite nonempty iterators, but is more efficient, doesn’t require Clone or Hash implementations, and doesn’t hang if provided an infinite non-constant iterator.

This function will hang if given an infinite constant iterator.

Examples

use malachite_base::iterators::is_constant;

assert_eq!(is_constant([1; 4].iter()), true);
assert_eq!(is_constant([1, 2, 3, 4].iter()), false);
assert_eq!(is_constant(0..), false);