js 二维数组匹配另外一个数组的值

Question

有一个二维数组和一个一维数组，根据一维数组提供的值，找到对应二维数组中的元素

二维数组 数字是编号

[

  ["1","商务"]，

  ["2","健身"]，

  ["3","游泳"],

  ["4","餐饮"],

  ["5","休闲"]，

  ["6","住宿"]

]

[1,3,5]

对应 ["1","商务"]  ["3","游泳"] ["5","休闲"]

Answer 1

Array.prototype.myFilter=function(ary){  return this.filter(function(item){     return  ary.indexOf(Number(item[0]))!=-1;  })}var a=[  ["1","商务"],  ["2","健身"],  ["3","游泳"],  ["4","餐饮"],  ["5","休闲"],  ["6","住宿"]];    var b=[1,3,5];    console.log(a.myFilter(b))