strsim-rs

• [Levenshtein] and [Damerau-Levenshtein]
• [Jaro and Jaro-Winkler] - this implementation of Jaro-Winkler does not limit the common prefix length

Installation

```toml

Cargo.toml

[dependencies] strsim = "0.5.2" ```

Documentation

You can change the version in the url to see the documentation for an older version in the changelog.

Usage

```rust extern crate strsim;

use strsim::{hamming, levenshtein, dameraulevenshtein, jaro, jarowinkler, levenshteinagainstvec, dameraulevenshteinagainstvec, jaroagainstvec, jarowinkleragainstvec};

fn main() { match hamming("hamming", "hammers") { Ok(distance) => assert_eq!(3, distance), Err(why) => panic!("{:?}", why) }

assert_eq!(3, levenshtein("kitten", "sitting"));

assert_eq!(1, damerau_levenshtein("specter", "spectre"));

assert!((0.392 - jaro("Friedrich Nietzsche", "Jean-Paul Sartre")).abs() <
        0.001);

assert!((0.911 - jaro_winkler("cheeseburger", "cheese fries")).abs() <
        0.001);

// get vectors of values back
let v = vec!["test", "test1", "test12", "test123", "", "tset"];

assert_eq!(levenshtein_against_vec("test", &v),
           vec![0, 1, 2, 3, 4, 2]);

assert_eq!(damerau_levenshtein_against_vec("test", &v),
           vec![0, 1, 2, 3, 4, 1]);

let jaro_distances = jaro_against_vec("test", &v);
let jaro_expected = vec![1.0, 0.933333, 0.888889, 0.857143, 0.0, 0.916667];
let jaro_delta: f64 = jaro_distances.iter()
                                    .zip(jaro_expected.iter())
                                    .map(|(x, y)| (x - y).abs() as f64)
                                    .fold(0.0, |x, y| x + y as f64);
assert!(jaro_delta < 0.0001);

let jaro_winkler_distances = jaro_winkler_against_vec("test", &v);
let jaro_winkler_expected = vec![1.0, 0.96, 0.933333, 0.914286, 0.0, 0.925];
let jaro_winkler_delta = jaro_winkler_distances.iter()
                             .zip(jaro_winkler_expected.iter())
                             .map(|(x, y)| (x - y).abs() as f64)
                             .fold(0.0, |x, y| x + y as f64);
assert!(jaro_winkler_delta < 0.0001);

} ```

Development

Install Vagrant, and run vagrant up.

License

MIT