JavaScript chunk array generator example

chunk.js

function * chunkGen(collection, size=2, i=0) {
  for (; i < collection.length; i += size) {
    yield collection.slice(i, i + size);
  }
}

function chunk(collection, size=1) {
  const chunked = [];
  const gen = chunkGen(collection, size);
  let c = gen.next();
  while (!c.done) {
    chunked.push(c.value);
    c = gen.next();
  }
  return chunked;
}

const result = chunk([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], 3);
console.log(result);