javascript - 将键推送到数组或 JavaScript 对象？

Question

我需要创建一个具有特定键的数组或js对象，应将其推送到空数组或js对象。之后，我需要根据该键推送一些特定值，如下所示:

var arr = ["john":["jval1","jval2"], "matt":["mval1","mval2","mval3"]]

我知道这不是 js 对象或数组的正确表示法，但这就是想法。

这基本上就是我想做的事情:

var keys = ["john","matt"];             //my keys
var jvals = ["jval1","jval2"];          //my values for key john
var mvals = ["mval1","mval2","mval3"];  //my values for key matt

var arr = [];

for(var i in keys) arr.push(keys[i])  //pushing the names (I need to push this names as keys so next lines should work)

for(var i in jvals) arr["john"].push(jvals[i])  //Trying to push john values, which doesn't work because "john is not a key"
for(var i in mvals) arr["matt"].push(mvals[i])  //Same.

这根本不起作用，那么我该怎么做呢？

Answer 1

这是代码的更短版本，使用forEach

var keys = ["john","matt"];             //my keys
var jvals = ["jval1","jval2"];          //my values for key john
var mvals = ["mval1","mval2","mval3"];  //my values for key matt
var object = {}
  keys.forEach(function(key, index) {
    object[key] = index == 0 ? jvals.slice() : mvals.slice()
  });
console.log(object)