Bit Plane Return

Bit Plane ReturnCodewars

Approach

Bit planeWikipedia

Solve the problem

1. convert to 8bits

2. return 7-plane's position bit's if bit is 00010000 and plane is 4 7-4 = 3, the thrids array of bits is 1. so must return 1

Solution

JavaScript

const bitSlice = (image, plane) => image.map((row) => {
  return row.map((v) => {
    return Number(v.toString(2).padStart(8, '0')[7 - plane]);
  });
});