03-拓展运算符

拓展运算符

// 1.数组合并
  // const kuaizi = ['王太利','肖扬']
  // const fenghuang = ['曾毅','玲花']
  // // const zxxpg = kuaizi.concat(fenghuang)
  // const zxxpg = [...kuaizi,...fenghuang]
  // console.log(zxxpg) // ['王太利','肖扬','曾毅','玲花']
  // 2.数组的克隆
  const sanzhihua = ['E','G','M']
  // 浅拷贝
  const sanyecao = [...sanzhihua]
  console.log(sanyecao) //(3) ["E", "G", "M"]
  // 3.将伪数组转为真正的数组
  const divs = document.querySelectorAll('div')
  const divArr = [...divs]
  console.log(divArr);// arguments 也可以转为真正的数组  -->  (3) [div, div, div]