``` const repeatFunc = repeat(console.log, 4, 3000); repeatFunc("helloworld"); // 每3秒打印一个helloworld，总计执行4次 function repeat(fn, count, timeout) { return function () { return new Promise((resolve, reject) \=> { let num = 0 let timer timer = setInterval(() => { num++ if (num >= count) { reject() clearInterval(timer) } resolve(fn(arguments[0])) }, timeout); }) } } ```