Crate itertools

Extra iterator adaptors, functions and macros.

To extend Iterator with methods in this crate, import the Itertools trait:

# #[allow(unused_imports)]
use itertools::Itertools;

Now, new methods like interleave are available on all iterators:

use itertools::Itertools;

let it = (1..3).interleave(vec![-1, -2]);
itertools::assert_equal(it, vec![1, -1, 2, -2]);

Most iterator methods are also provided as functions (with the benefit that they convert parameters using IntoIterator):

use itertools::interleave;

for elt in interleave(&[1, 2, 3], &[2, 3, 4]) {
    /* loop body */
    # let _ = elt;
}

Crate Features

• use_std
  • Enabled by default.
  • Disable to compile itertools using #![no_std]. This disables any item that depend on allocations (see the use_alloc feature) and hash maps (like unique, counts, into_grouping_map and more).
• use_alloc
  • Enabled by default.
  • Enables any item that depend on allocations (like chunk_by, kmerge, join and many more).

Rust Version

This version of itertools requires Rust 1.63.0 or later.