Create a range of numbers

createRange.js

function* range(start, end) {
  yield start;
  if (start === end) return;
  yield* range(start + 1, end);
}

const createRange = (a, b) => [...range(a, b)];

// Example Usage: Create array of lowercase alphabet
const alphabet = createRange(97, 122).map(k => String.fromCharCode(k));