The python's generator implementation for javascript. Just for fun

js_generators.js

'use strict';

function IntGenerator(start, end, step) {
	this.start = start || 0;
	this.current = start || 0;
	this.end = end || this.current;
	this.step = step || ((this.current > this.end) ? -1 : 1);
}

IntGenerator.prototype[Symbol.iterator] = function () {
	return {
		next: () => {
			this.current += this.step
			return {
				done: this.start <= this.end ? 
					this.current > this.end :
					this.current < this.end,
				value: this.current,
			};
		},
	};
}

var generator = new IntGenerator(1, 5);
for(var i of generator) {
	console.log(i);
}

console.log("Running another one")

generator = new IntGenerator(1,10000)

for(var i of generator) {
	console.log(i);
}