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ES6でFizzBuzz

Last updated at Posted at 2017-04-13

#ES6の標準的な書き方でFizzBuzz書くメモ

関数をくっつけるためのシンタックスシュガーが標準で欲しい

  • 変更(4/15)ykztsさんがspread構文で書いたらシンプルになることを教えてくれました
fizzbuzz.js
const compose = ([f, ...fs]) => f? f(compose(fs)): (x) => x;
const num = () => (x) => x.toString();
const fizz = (f) => (x) =>  x % 3 == 0? 'Fizz': f(x);
const buzz = (f) => (x) =>  x % 5 == 0? 'Buzz': f(x);
const fizzbuzz = (f) => (x) => x % 3 == 0 && x % 5 == 0? 'FizzBuzz' : f(x);

const f = compose([fizzbuzz, buzz, fizz, num])

Array(100).fill().map((_, i) => f(i+1)).map(s => console.log(s));
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