text: /*
   * @Editors: Liu baitong
   * @Date: 2020-01-15 16:36:15
   * @LastEditTime : 2020-01-15 17:49:45
   * @Description: 
   */
  /*
   * @Editors: Liu baitong
   * @Date: 2020-01-15 16:36:15
   * @LastEditTime : 2020-01-15 16:49:24
   * @Description: 
   */
   
   
  
  let a = [{
      '我是': 33
  },{
      '反倒是': 33
  },{
      '22': 33
  }]
   let old = a.map(item => Object.keys(item))
  let b = flatten([[2,33,445], [33,5,67,2]])
  console.log([[2,33,445], [33,5,67,2]].toString());
  