getlength

a permutations/combinations iterator
an integer

It helps in 1) generating permutations and combinations with or
    without replacement; 2) with distinct items or non-distinct items (multiset);
    3) calculating number of combinations or permutations in various situations. All
    generated sequences are in lexicographical order (AKA, dictionary order). The
    algorithms to generate permutations and combinations are memory efficient. These
    iterative algorithms enable users to process all sequences without putting all
    results in the memory at the same time. The algorithms are written in C/C++ for
    faster performances.

getlength: Get the length for a iterator

Description

Usage

Arguments