Cycle generator

JavaScript, Function, Generator · Oct 11, 2020

Creates a generator, looping over the given array indefinitely.

  • Use a non-terminating while loop, that will yield a value every time is called.
  • Use the module operator (%) with Array.prototype.length to get the next value's index and increment the counter after each yield statement.
const cycleGenerator = function* (arr) {
  let i = 0;
  while (true) {
    yield arr[i % arr.length];
const binaryCycle = cycleGenerator([0, 1]);; // { value: 0, done: false }; // { value: 1, done: false }; // { value: 0, done: false }; // { value: 1, done: false }

Written by Angelos Chalaris

I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.

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