@extra-array/swap/index.js

Exchanges two values.

'use strict';
function index(x, i = 0) {
    return i < 0 ? Math.max(x.length + i, 0) : Math.min(i, x.length);
}
function swap$(x, i, j) {
    var i = index(x, i), j = index(x, j);
    var t = x[i];
    x[i] = x[j];
    x[j] = t;
    return x;
}
function swap(x, i, j) {
    return swap$(x.slice(), i, j);
}
module.exports = swap;