封装的一些工具方法

1. 深拷贝

import _ from 'underscore'
interface DAMNU_ENABLE {
  [key: string]: string | boolean | DAMNU_ENABLE | number
}

function formatRequestParams(params: DAMNU_ENABLE): DAMNU_ENABLE {
  const result: DAMNU_ENABLE = {}
  for (const key in params) {
    if (Object.prototype.hasOwnProperty.call(params, key)) {
      const value = params[key]
      // 对象且不为 null function
      if (typeof value === 'object' && !_.isNull(value) && !_.isFunction(value)) {
        result[key] = formatRequestParams(value)
      }
      if (typeof value === 'string' && value.trim().length !== 0) {
        //
        result[key] = value
      }
      if (_.isNumber(value)) {
        result[key] = value
      }
    }
  }

  return result
}

2. 将数字n分割成x份，并且每份的数都是整数，且大于等于 n / (2 * x)，小于等于 2 * n / x，编写一个算法

// 获取之和为 n 的 x 个数数组序列
const getParsedArray = (n, x, result = []) => {
  if (x === 1) return [n]
  for (let i = 1; i < n; i++) {
    result.push([i, ...getParsedArray(n - i, x - 1)])
  }
  return result
}

const mergeToResult = res => {
  if (res.length === 1) return res
  const result = []
  res.map(firstItem => {
    const temp = firstItem[0]
    if (typeof firstItem[1] !== 'number') {
      firstItem.map((secondItem, index) => {
        if (index !== 0) {
          result.push([temp, ...secondItem])
        }
      })
    } else {
      result.push(firstItem)
    }
  })
  return result
}

const splitNumberToArray = (num, x) => {
  if (x === 1) return [num]
  const start = num / 2 / x
  const end = (2 * num) / x
  const result = mergeToResult(getParsedArray(num, x))
  return result.filter(item => item.every(item1 => item1 >= start && item1 <= end))
}

3. 日期格式化

const formatDate = date => {
  const d = new Date(date)
  const year = d.getFullYear()
  let month = '' + (d.getMonth() + 1)
  let day = '' + d.getDate()
  if (month.length < 2) month = '0' + month
  if (day.length < 2) day = '0' + day
  return [year, month, day].join('-')
}

// 格式化时间
const formatDateTime = (time, second, minute) => {
  let result =
    time.getFullYear() +
    '-' +
    (time.getMonth() + 1 < 10 ? '0' + (time.getMonth() + 1) : time.getMonth() + 1) +
    '-' +
    (time.getDate() < 10 ? '0' + time.getDate() : time.getDate()) +
    ' ' +
    (time.getHours() < 10 ? '0' + time.getHours() : time.getHours()) +
    ':'
  if (minute === '00' && second === '00') {
    result += '00' + ':' + '00'
  } else if (second === '00') {
    result =
      result + (time.getMinutes() < 10 ? '0' + time.getMinutes() : time.getMinutes()) + ':' + '00'
  } else {
    result =
      result +
      (time.getMinutes() < 10 ? '0' + time.getMinutes() : time.getMinutes()) +
      ':' +
      (time.getSeconds() < 10 ? '0' + time.getSeconds() : time.getSeconds())
  }

  return result
}