range-generator

gistfile1.txt

function* range(fromInclusive, toExclusive, step = 1) {
  if (toExclusive == undefined) {
    toExclusive = fromInclusive;
    fromInclusive = 0;
  }

  for (let i = fromInclusive; (toExclusive - i) * step > 0; i += step) {
    yield i;
  }
}

console.log([...range(0, 10, 4)]);
console.log([...range(20, 10, -2)]);
console.log([...range(-10, 0)]);
console.log([...range(-10)]);
console.log([...range(0, 10)]);
console.log([...range(10)]);

for (const i of range(0, 10)) {
  console.log(i);
}
function* range(fromInclusive, toExclusive, step = 1) {
  if (toExclusive == undefined) {
    toExclusive = fromInclusive;
    fromInclusive = 0;
  }

  for (let i = fromInclusive; (toExclusive - i) * step > 0; i += step) {
    yield i;
  }
}

console.log([...range(0, 10, 4)]);
console.log([...range(20, 10, -2)]);
console.log([...range(-10, 0)]);
console.log([...range(-10)]);
console.log([...range(0, 10)]);
console.log([...range(10)]);

for (const i of range(0, 10)) {
  console.log(i);
}