Extra iterator adaptors, functions and macros. Requires Rust 1.2+.

Please read the API documentation here

How to use with cargo:

[dependencies]
itertools = "0.4"

How to use in your crate:

#[macro_use] extern crate itertools;

use itertools::Itertools;

• 0.4.13
  • Add .minmax() and .minmax_by_key(), iterator methods for finding both minimum and maximum in one scan.
  • Add .format_default(), a simpler version of .format() (lazy formatting for iterators).
• 0.4.12
  • Add .zip_eq(), an adaptor like .zip() except it ensures iterators of inequal length don't pass silently (instead it panics).
  • Add .fold_while(), an iterator method that is a fold that can short-circuit.
  • Add .partition_map(), an iterator method that can separate elements into two collections.
• 0.4.11
  • Add .get() for Stride{,Mut} and .get_mut() for StrideMut
• 0.4.10
  • Improve performance of .kmerge()
• 0.4.9
  • Add k-ary merge adaptor .kmerge()
  • Fix a bug in .islice() with ranges a..b where a > b.
• 0.4.8
  • Implement Clone, Debug for Linspace
• 0.4.7
  • Add function diff_with() that compares two iterators
  • Add .combinations_n(), an n-ary combinations iterator
  • Add methods PutBack::with_value and PutBack::into_parts.
• 0.4.6
  • Add method .sorted()
  • Add module itertools::free with free function variants of common iterator adaptors and methods. For example enumerate(iterable), rev(iterable), and so on.
• 0.4.5
  • Add .flatten()
• 0.4.4
  • Allow composing ZipSlices with itself
• 0.4.3
  • Write iproduct!() as a single expression; this allows temporary values in its arguments.
• 0.4.2
  • Add .fold_options()
  • Require Rust 1.1 or later
• 0.4.1
  • Update .dropping() to take advantage of .nth()
• 0.4.0
  • .merge(), .unique() and .dedup() now perform better due to not using function pointers
  • Add free functions enumerate() and rev()
  • Breaking changes:
    • Return types of .merge() and .merge_by() renamed and changed
    • Method Merge::new removed
    • .merge_by() now takes a closure that returns bool.
    • Return type of .dedup() changed
    • Return type of .mend_slices() changed
    • Return type of .unique() changed
    • Removed function times(), struct Times: use a range instead
    • Removed deprecated macro icompr!()
    • Removed deprecated FnMap and method .fn_map(): use .map_fn()
    • .interleave_shortest() is no longer guaranteed to act like fused
• 0.3.25
  • Rename .sort_by() to .sorted_by(). Old name is deprecated.
  • Fix well-formedness warnings from RFC 1214, no user visible impact
• 0.3.24
  • Improve performance of .merge()'s ordering function slightly
• 0.3.23
  • Added .chunks_lazy(), similar to (and based on) .group_by_lazy().
  • Tweak linspace to match numpy.linspace and make it double ended.
• 0.3.22
  • Added ZipSlices, a fast zip for slices
• 0.3.21
  • Remove Debug impl for Format, it will have different use later
• 0.3.20
  • Optimize .group_by_lazy()
• 0.3.19
  • Added .group_by_lazy(), a possibly nonallocating group by
  • Added .format(), a nonallocating formatting helper for iterators
  • Remove uses of RandomAccessIterator since it has been deprecated in rust.
• 0.3.17
  • Added (adopted) Unfold from rust
• 0.3.16
  • Added adaptors .unique(), .unique_by()
• 0.3.15
  • Added method .sort_by()
• 0.3.14
  • Added adaptor .while_some()
• 0.3.13
  • Added adaptor .interleave_shortest()
  • Added adaptor .pad_using()
• 0.3.11
  • Added assert_equal function
• 0.3.10
  • Bugfix .combinations() size_hint.
• 0.3.8
  • Added source RepeatCall
• 0.3.7
  • Added adaptor PutBackN
  • Added adaptor .combinations()
• 0.3.6
  • Added itertools::partition, partition a sequence in place based on a predicate.
  • Deprecate icompr!() with no replacement.
• 0.3.5
  • .map_fn() replaces deprecated .fn_map().
• 0.3.4
  • .take_while_ref() by-ref adaptor
  • .coalesce() adaptor
  • .mend_slices() adaptor
• 0.3.3
  • .dropping_back() method
  • .fold1() method
  • .is_empty_hint() method

Dual-licensed to be compatible with the Rust project.

Licensed under the Apache License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0 or the MIT license http://opensource.org/licenses/MIT, at your option. This file may not be copied, modified, or distributed except according to those terms.