ランダム麻雀

random-mahjong.ts

const allHais = [
  '一萬', '二萬', '三萬', '四萬', '五萬', '六萬', '七萬', '八萬', '九萬',
  '一筒', '二筒', '三筒', '四筒', '五筒', '六筒', '七筒', '八筒', '九筒',
  '一索', '二索', '三索', '四索', '五索', '六索', '七索', '八索', '九索',
  '東　', '南　', '西　', '北　', '白　', '発　', '中　',
] as const;
type HaiName = typeof allHais[number];
type HaiNameArray = HaiName[];

type HaiNameSetForShow = {
  upper: string[];
  lower: string[];
};

const show = (hais: HaiNameArray): void => {
  const { upper, lower }: HaiNameSetForShow = hais.reduce(
    (set: HaiNameSetForShow, hai: HaiName) => ({
      upper: [...set.upper, hai[0]],
      lower: [...set.lower, hai[1]],
    }),
    { upper: [], lower: [] }
  );
  console.log(`${upper.join('')}\n${lower.join('')}`);
};

const [dragon, hiddenDragon, ...tehai] = [...allHais, ...allHais, ...allHais, ...allHais].sort(() => Math.random() - 0.5).slice(0, 16);

show([dragon, hiddenDragon]);
show(tehai.sort((a, b) => allHais.findIndex((v) => v === a) - allHais.findIndex((v) => v === b)));

zzz.console

$ deno run https://gist.githubusercontent.com/hogashi/e19701da1ff5c2934bab915d695978a7/raw/ecb5acc41ce74c1d72486af4a9e4edc88673f302/random-mahjong.ts
七六
萬索
四六八一二三五一三八南白白発
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