Resize (2D but flat) array of values with nearest neighbour algorithm

resize-nearest-neighbour.js

const width = 300;
const height = 200;
const newWidth = width * 2;
const newHeight = height * 2;
const xRatio = width / newWidth;
const yRatio = height / newHeight;
const resizeValues = (id, values) => {
  const newValues = new Array(newWidth * newHeight);
  for (let i = 0; i < newHeight; i++) {
    for (let j = 0; j < newWidth; j++) {
      const x = ~~(j * xRatio); // ~~ = Math.floor but faster
      const y = ~~(i * yRatio);
      newValues[i * newWidth + j] = values[y * width + x];
    }
  }
  return newValues;
};