Tool

A grab-bag of useful functions for functional programming.

• Docs: https://stebalien.github.io/tool-rs/tool/
• Build Status:
• Crate: tool

Example

Non-empty strings

extern crate tool;
use tool::prelude::*;
fn main() {
    let strings: Vec<_> = vec!["my string", "", "asdf", ""]
        .into_iter()
        .filter(non_empty)
        .collect();
    assert_eq!(strings, vec!["my string", "asdf"]);
}

First item in an iterator of tuples.

extern crate tool;
use tool::prelude::*;
fn main() {
    let strings: Vec<_> = vec![("first", 1), ("second", 2), ("third", 3), ("fourth", 4)]
        .into_iter()
        .map(first)
        .collect();

    assert_eq!(strings, vec!["first", "second", "third", "fourth"]);
}

Compile-Time Flags (cargo features)

• use_std (default: enabled) - Disable this if you're project doesn't depend on libstd.
• unstable (default: disabled) - Enable this if you are targeting nightly and want to be able to use the latest unstable features.

Unstable

Currently, the following features are unstable:

• The functor module. Functors require the impl Trait feature so this module will stabilize when conservative_impl_trait stabilizes.