function rgbToHsv(rgb) {
  const [r, g, b] = rgb.map(value => value / 255);
  const v = Math.max(r, g, b);
  const min = Math.min(r, g, b);
  const delta = v - min;
  const s = v === 0 ? 0 : delta / v;

  let h = 0;
  
  const getRes = (h, s, v) => [Math.round(h), Math.round(s * 100), Math.round(v * 100)];
  
  if (s === 0) return getRes(h, s, v);
  
  if (v === r) {
    h = (g - b) / delta;
  } else if (v === g) {
    h = 2 + (b - r) / delta;
  } else {
    h = 4 + (r - g) / delta;
  }
  h *= 60;
  if (h < 0) h += 360;

  return getRes(h, s, v);
}

function rgbToHsv(rgb) {
  let [r, g, b] = rgb;
  const v = Math.max(r, g, b) / 255;
  if (v == 0) return Array.of(0, 0, 0);
  r /= v, g /= v, b /= v;
  const s = 1 - Math.min(r, g, b) / 255;
  if (s == 0) return Array.of(0, 0, v * 100);
  r = 255 - (255 - r) / s;
  g = 255 - (255 - g) / s;
  b = 255 - (255 - b) / s;
  const peak = Math.max(r, g, b);
  let h = 0;
  if (r == peak) h = g < b ? 360 - b * 60 / 255 : g * 60 / 255;
  else if (g == peak) h = r > b ? 120 - r * 60 / 255 : 120 + b * 60 / 255;
  else h = r > g ? 240 + r * 60 / 255 : 240 - g * 60 / 255;
  return Array.of(Math.round(h), Math.round(s * 100), Math.round(v * 100));
}

const helloWorld = (world) => world ? `Hello World baby` : `No World`;