Function permutator::get_permutation_for

pub fn get_permutation_for<T>(
    objects: &[T], 
    degree: usize, 
    x: usize
) -> Result<Vec<&T>, &str>

Get permutation at specific location. If objects is [1, 2, 3, 4] and degree is 2 then all possible permutation will be [1, 2], [1, 3], [1, 4], [2, 1], [2, 3], [2, 4], [3, 1], [3, 2], [3, 4], [4, 1], [4, 2], [4, 3].

Parameters

• objects a set of data that is a based for permutation.
• degree number of element per each location.
• x is a location to get a permutation

Examples

use permutator::get_permutation_for;
 
let nums = [1, 2, 3, 4];
get_permutation_for(&nums, 2, 0); // return Result([1, 2])
get_permutation_for(&nums, 3, 0); // return Result([1, 2, 3])
get_permutation_for(&nums, 2, 5); // return Result([2, 4])
get_permutation_for(&nums, 2, 11); // return Result([4, 3])
get_permutation_for(&nums, 2, 12); // return Err("parameter x is outside a possible length")
get_permutation_for(&nums, 5, 0); // return Err("Insufficient number of object in parameters objects for given parameter degree")