Yet another ES6 Fibonacci generator

es6_fibo.js

'use strict'

function* fibo() {
  let [a,b] = [0,1];
  while (true) {
    yield b;
    [a, b] = [b, a + b];
  }
}

// Let's print first 1000 Fibonacci numbers:

const N = 1000;
let fi = fibo();
[...Array(N).keys()].forEach((v,i) => console.log(i+1, fi.next().value));