Combination

what it is

combination is a lib to do math jobs like permutate and combinate data from vec.

example

extern crate combination;
use combination::permutate::*;

#[test]
#[cfg(test)]
fn test_permutation() {
    let data = vec![10, 20, 30, 40];
    let val = permutate_vec(&data);
    for item in val {
       println!("{:?}", item);
    }
}

API

combine

Get combination data from a vec

• for example

extern crate combination;
use combination::combine::*;
let val = combine_vec(&vec![10, 20, 30, 40], 2);
for item in val {
    println!("{:?}", item);
}

• and will get:

[10, 20]
[10, 30]
[10, 40]
[20, 30]
[20, 40]
[30, 40]

permutate

Get permutation data from a vec

• for example

extern crate combination;
use combination::permutate::_;
let val = permutate_vec(&vec![10, 20, 30, 40]);
for item in val {
    println!("{:?}", item);
}

• and will get:

    [30, 10, 40, 20]
    [30, 10, 20, 40]
    [40, 10, 30, 20]
    [10, 40, 30, 20]
    [10, 30, 40, 20]
    [10, 30, 20, 40]
    [40, 10, 20, 30]
    [10, 40, 20, 30]
    [10, 20, 40, 30]
    [10, 20, 30, 40]
    [40, 30, 20, 10]
    [30, 40, 20, 10]
    [30, 20, 40, 10]
    [30, 20, 10, 40]
    [40, 20, 30, 10]
    [20, 40, 30, 10]
    [20, 30, 40, 10]
    [20, 30, 10, 40]
    [40, 20, 10, 30]
    [20, 40, 10, 30]
    [20, 10, 40, 30]
    [20, 10, 30, 40]