LeetCode: Counting Bits Solution

Approach

Convert number to binary string using .toString(2)

Count the 1s

Implementation

1var countBits = function (n) {
2  return Array.from(
3    { length: n + 1 },
4    (_, i) => i.toString(2).replace(/0/g, "").length
5  )
6}

References

Original problem

String.prototype.toString()