Function malachite_base::tuples::exhaustive::lex_unique_pairs

pub fn lex_unique_pairs<I: Iterator>(xs: I) -> LexUniquePairs<I> where
    I::Item: Clone, 

This documentation applies not only to lex_unique_pairs, but also to lex_unique_triples, lex_unique_quadruples, and so on. See lex_unique_tuples for more information.

Generates $k$-tuples of elements from a single iterator, such that each tuple has no repeated elements.

The source iterator should not repeat any elements, but this is not enforced.

The order is lexicographic with respect to the order of the element iterator.

If the input iterator is infinite, the output length is also infinite.

If the input iterator length is $n$, the output length is $\frac{n!}{k!}$.

If xs is empty, the output is also empty.

Examples

See here.