javascript javascript - frequency（배열에서같은갯수를뽑아서배열로리턴）

Posted 2021-05-03

  freq(dice) {
    // frequencies of dice values
    const freqs = new Map();
    for (let d of dice) freqs.set(d, (freqs.get(d) || 0) + 1);
    return Array.from(freqs.values());
  }