Function paint

ch5-game-of-life/gol.js:57–59

(cell, x, y)

const buf = new Uint32Array(data.data.buffer);

function paint(cell, x, y) { // <4>
  buf[SIZE * x + y] = cell ? BLACK : WHITE;
}

const grid = new Grid(SIZE, new ArrayBuffer(2 * SIZE * SIZE), paint); // <5>
for (let x = 0; x < SIZE; x++) { // <6>