Lazy list comprehension using generator

lazy-take-while-list.js

// Inspired by Haskell's `takeWhile (<10000) $ map (^3) [1..]`
let nextVal = (x) => x.next().value;

function* mList(x = 0) {
  while(1) yield x++;
}

function* map(fn, list) {
  while(1) {
    yield fn(nextVal(list));
  }
}

function* takeWhile(p, list) {
  let nv = nextVal(list);
  while (p(nv)) {
    yield nv;
    nv = nextVal(list);
  }
}

let tripple = (x) => x * x * x;
let lessThan = (x) => (y) => y < x

let trippledValuesLessThen100 = takeWhile(lessThan(100), map(tripple, mList(1)));
let res = [for (x of trippledValuesLessThen100) x];
console.log(res); // [1,8,27,64]