id-permutations
v1.0.6id-permutations
Blazing fast algorithms for generating a list of permutations for a given id, or the id from its corresponding permutation.
Example
const N_POSITIONS = 10;
const {
getPermutationsFromId,
getIdFromPermutations,
} = require('id-permutations')(N_POSITIONS);
getPermutationsFromId(0); // => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
getPermutationsFromId(1); // => [1, 0, 2, 3, 4, 5, 6, 7, 8, 9]
getPermutationsFromId(2); // => [2, 0, 1, 3, 4, 5, 6, 7, 8, 9]
getPermutationsFromId(3628799); // => [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
getIdFromPermutations([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]); // => 0
getIdFromPermutations([1, 0, 2, 3, 4, 5, 6, 7, 8, 9]); // => 1
getIdFromPermutations([2, 0, 1, 3, 4, 5, 6, 7, 8, 9]); // => 2
getIdFromPermutations([9, 8, 7, 6, 5, 4, 3, 2, 1, 0]); // => 3628799
npm i id-permutations
Metadata
- MIT
- Whatever
- Josep M Sobrepere
- released 11/5/2020