Make JavaScript Great Again

number-prototype-iterator.js

Object.defineProperty(Number.prototype,Symbol.iterator,{
  *value({ start = 0, step = 1 } = {}) {
     var inc = this > 0 ? step : -step;
     for (let i = start; Math.abs(i) <= Math.abs(this); i += inc) {
        yield i;
     }
  },
  enumerable: false,
  writable: true,
  configurable: true
});

[ ...8 ];  // [0,1,2,3,4,5,6,7,8]
[ ...5[Symbol.iterator]({ start: 3 }) ];  // [3,4,5]
[ ...10[Symbol.iterator]({ start: 2, step: 4 }) ];  // [2,6,10]

[ ...-3 ];  // [0,-1,-2,-3]
[ ...(-3)[Symbol.iterator]({ start: 3, step: 2 }) ];  // [3,1,-1,-3]

wow 👍

What is this black magic!