javascript - 将 getTime() 之类的日期方法作为回调传递

Question

我想传递日期对象方法，例如 getMinutes()、getTime() 或 getDay() 作为回调功能如:

formatDate = (date, callback) => {
    date.callback()
}

或更高级:

formatDateArray = (dateArray, callback) => {
        dateArray.map(date => date.callback())
    }

我有什么选择？

Answer 1

您可以使用 Fuction.prototype.call 通过将日期对象作为 this 参数传递来调用 Date 方法:

const getTime = Date.prototype.getTime;
const getDay = Date.prototype.getDay;
const getMinutes = Date.prototype.getMinutes

formatDateArray = (dateArray, callback) => {
  return dateArray.map(date => callback.call(date))
}

console.log(formatDateArray([new Date(), new Date('August 17, 2020 03:24:00')], getTime));
console.log(formatDateArray([new Date(), new Date('August 17, 2020 03:24:00')], getDay));
console.log(formatDateArray([new Date(), new Date('August 17, 2020 03:24:00')], getMinutes));