ES6 Iterables

iterator.ts

class Multiplier implements Iterable<number> {
    constructor(public number: number) {

    }
    [Symbol.iterator]() {
        let number = this.number;

        return {
            next(): IteratorResult<number> {
                number *= Math.random() * 2;
                return {
                    done: number < 0.5,
                    value: number
                };
            }
        }
    }
}

let multiplier = new Multiplier(42);
for (let i of multiplier) {
    console.log(`Current iteration: ${i}`);
}

sample_output.txt

Current iteration: 37.04517564660692
Current iteration: 73.88086261201755
Current iteration: 6.809203593710648
Current iteration: 1.4324102905903624
Current iteration: 0.9013923120476415
Current iteration: 1.3149630996266073
Current iteration: 1.4819569202441922
Current iteration: 2.4830858224636168
Current iteration: 2.332156145855589
Current iteration: 4.076997242122628
Current iteration: 2.4428855961041283
Current iteration: 4.139021354293038
Current iteration: 5.6081057444722004
Current iteration: 7.254339601162417
Current iteration: 4.773110470931939
Current iteration: 6.426869952071218
Current iteration: 4.720677985535
Current iteration: 4.444848676342253
Current iteration: 6.401115794012355
Current iteration: 8.632797775220308
Current iteration: 13.421856370901455
Current iteration: 23.509687899773283
Current iteration: 36.9684715035754
Current iteration: 69.23605587799415
Current iteration: 73.55415353713873
Current iteration: 101.82727302706321
Current iteration: 109.45323141826252
Current iteration: 99.65354815940272
Current iteration: 198.16342002985436
Current iteration: 381.2678689121242
Current iteration: 17.26526045653166
Current iteration: 30.507134864481976
Current iteration: 12.209427795873692
Current iteration: 22.916891571625406
Current iteration: 12.799666249249196
Current iteration: 22.975663036141217
Current iteration: 10.533360982184304
Current iteration: 8.838898390186797
Current iteration: 13.791485160640715
Current iteration: 18.50082191450564
Current iteration: 24.940254726132743
Current iteration: 17.159966758985107
Current iteration: 30.070795382148066
Current iteration: 26.969991564323724
Current iteration: 31.45667803791658
Current iteration: 41.019508663840476
Current iteration: 29.481448847703273
Current iteration: 6.802927047888707
Current iteration: 11.454218902686424
Current iteration: 12.049633384366308
Current iteration: 7.968147061624743
Current iteration: 4.19379962100302
Current iteration: 6.323382170765618
Current iteration: 8.495864038478661
Current iteration: 5.888419286283522
Current iteration: 5.723065070082794
Current iteration: 3.5921826198132942
Current iteration: 5.483718469402575
Current iteration: 10.248542006885687
Current iteration: 1.5157851017934882
Current iteration: 2.674025981045074
Current iteration: 2.847149780974515