Source Code
Array.prototype.shuffle = function shuffler() {
for (let i = 0; i < this.length - 1; i++) {
let pick = Math.floor(Math.random() * (this.length - i));
if (pick !== 0) {
let item = this[pick + i];
this[pick + i] = this[i];
this[i] = item;
}
}
return this;
};
Usage
let a = Array(10)
.fill(0)
.map((_, i) => i);
// a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
a.shuffle()
// a = [6, 7, 9, 0, 2, 1, 5, 4, 8, 3]
