node-mirai-fgo-gacha/src/shuffle.js

node-mirai-sdk fgo gacha plugin

const shuffle = a => {
  for (let i = a.length - 1; i > 0; i --) {
      const j = Math.floor(Math.random() * (i + 1));
      [a[i], a[j]] = [a[j], a[i]];
  }
  return a;
};

module.exports = shuffle;