[ES6] Using generator with for ... of statement

cool_generator.js

function* fibonacci() {
  let [prev, curr] = [0, 1];
  
  // using deconstruct feature implement reducer, really cool...
  for (;;) {
    [prev, curr] = [curr, curr + prev];
    yield curr;
  }
}

for (let n of fibonacci()) {
  if (n > 1000)
    break;
  
  console.log(n);
}