README.md

原生扩展

String.prototype.fdate

根据格式获取日期值

  /*
   * @param {String} field: y,M,d,h,m,s,S
   * @param {String} fmt: DATE_FMTS
   * @call str.fdate(field, fmt, def)
  */
  let str = '2022-06-23 10:53:45'
  console.log(str.fdate('y', 'yyyyMMdd'))  // 2022

String.prototype.toDate

根据日期格式format转换为日期对象

  /*
   * @param {String} fmt: DATE_FMTS
   * @call str.toDate(fmt)
  */
    let str = '2022-06-23 10:53:45'
    console.log(str.toDate('yyyy-MM-dd hh:mm')) // Thu Jun 23 2022 10:53:00 GMT+0800 (中国标准时间)

Date.prototype.field

获取日期指定域值

  /*
   * @param {String} f: y m d h m s S
   * @calldate.field(f)
  */
    let date = new Date()
    console.log(date.field('y')) // 2022

Date.prototype.format

日期格式化

  /*
   * @param {String} fmt: DATE_FMTS
   * @call date.format(fmt)
  */
    let date = new Date()
    console.log(date.format('yyyy-MM-dd')) // 2022-06-23

Date.prototype.setValue

更新日期值

  /*
   * @param {String || Number} val: '2022-06-30' || 20220630
   * @param {String} fmt: DATE_FMTS
   * @call date.setValue(val, fmt)
  */
    let date = new Date()
    console.log(date.setValue('2022-06-30')) // Thu Jun 30 2022 00:00:00 GMT+0800 (中国标准时间)

Date.prototype.yyyyMMdd

日期格式化(默认)

  /*
   * @call date.yyyyMMdd()
  */
    let date = new Date()
    console.log(date.yyyyMMdd()) // 2022-06-23

Date.prototype.trim

清空时分秒

  /*
   * @call date.trim()
  */
    let date = new Date()
    console.log(date.trim()) // Thu Jun 23 2022 00:00:00 GMT+0800 (中国标准时间)

Date.prototype.toFirstDate

一个月的第一天

  /*
   * @param {Boolean} trim
   * @call date.toFirstDate(trim)
  */
    let date = new Date()
    console.log(date.toFirstDate()) // Wed Jun 01 2022 17:08:33 GMT+0800 (中国标准时间)

Date.prototype.toLastDate

一个月的最后一天

  /*
   * @param {Boolean} trim
   * @call date.toLastDate(trim)
  */
    let date = new Date()
    console.log(date.toLastDate()) // Thu Jun 30 2022 17:09:26 GMT+0800 (中国标准时间)

Date.prototype.toIntDate

使用整数表示日期

  /*
   * @call date.toIntDate()
  */
    let date = new Date()
    console.log(date.toIntDate()) // 20220623

Date.prototype.addDays

添加天数

  /*
   * @param {Number} days
   * @call date.subDays(days)
  */
    let date = new Date()
    console.log(date.addDays(1)) // Wed Jun 24 2022 17:12:46 GMT+0800 (中国标准时间)

Date.prototype.subDays

减少天数

  /*
   * @param {Number} days
   * @call date.subDays(days)
  */
    let date = new Date()
    console.log(date.subDays(1)) // Wed Jun 22 2022 17:12:46 GMT+0800 (中国标准时间)

Date.prototype.addMonth

添加月份

  /*
   * @param {Number} m
   * @call date.addMonth(m)
  */
    let date = new Date()
    console.log(date.addMonth(1)) // Sat Jul 23 2022 17:15:09 GMT+0800 (中国标准时间)

Array.prototype.oneByOne

按顺序执行

  /*
   * @callback cb
   * @callback done
   * @call arr.oneByOne(cb, done)
  */
  let list = [1, 2, 3]
  list.oneByOne((item, next) => {
    console.log(item)
    next()
  }, done => {
    console.log('done')
  })
  // 1 2 3 done

Array.prototype.fetch

提取数组元素中的字段

  /*
   * @param {String} name
   * @call arr.fetch(name)
  */
  let list = [{ name: 'Ethan' }, { name: 'Linna' }, { name: 'Ryan' }]
  console.log(list.fetch('name')) // ["Ethan", "Linna", "Ryan"]

Array.prototype.groupBy

一维数组按字段分组

  /*
   * @param {String} name
   * @call arr.groupBy(name)
  */
  let list = [{ name: 'Ethan', sex: 'male' }, { name: 'Linna', sex: 'female' }, { name: 'Ryan', sex: 'male' }]
  let res = list.groupBy('sex')
  console.log(res)
  // [
  //{count: 2, name: 'male', subs: [{name: 'Ethan', sex: 'male'}, {name: 'Ryan', sex: 'male'}]}, 
  //{count: 1, name: 'female', subs: [{name: 'Linna', sex: 'female'}]}
  //]

Function.prototype.args

追加传入参数

  /*
   * @param {Object} arguments
   * @call .fetch(name)
  */
  function fn(parmas, cb) {
    console.log(parmas)
    cb && cb()
  }

  function test(cb, fb) {
    fn.args(this, fb)('p1', () => {
      if (condition) {
        cb && cb()
      } else {
        fb && fb()
      }
    })
  }

  test(() => {
    console.log('cb')
  }, () => {
    console.error('fb')
  })

Function.prototype.mixin

混入

  /*
   * @param {Function} fn
   * @call function.mixin(fn)
  */
    function fn1() {
      console.log(1)
    }
    function fn2() {
      console.log(2)
    }
    fn1.mixin(fn2)() // 1 2

Function.prototype.timeout

延时执行

  /*
   * @param {Number} time
   * @call function.timeout(time)
  */
    function fn() {
      console.log(1)
    }
    fn1.timeout(500, this)() // 1

Function.prototype.countdown

倒计时

  /*
   * @param {Number} count 运行次数
   * @param {Number} delay 间隔时间(毫秒)
   * @call function.countdown(count, delay)
  */
    function fn(count) {
      console.log(count)
    }
    fn.countdown(60, 1000, this)() // 60 59 ... 1