Question

基本上，我想：

var current = [
    [4, 'socks'],
    [2, 'pants'],
    [1, 'shoes'],
    [5, 'hats']
];

进入这个：

var current = {
    socks: 4,
    pants: 2,
    shoes: 1,
    hats: 5
};

Answer 1

如果您想迭代一个集合并返回一个对象，那么reduce()就是您的工具：

var current = [
    [4, 'socks'],
    [2, 'pants'],
    [1, 'shoes'],
    [5, 'hats']];

current.reduce(
   function(m,c) { 
       m[c[1]] = c[0]; 
       return m;
   }, {})

// Object {socks: 4, pants: 2, shoes: 1, hats: 5}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

Answer 2

您可以循环遍历数组中的数组，并将它们作为属性添加到对象中：

var result = {};
for (var i = 0; i < current.length; i++) {
  result[current[i][1]] = current[i][0];
}

演示：

var current = [
    [4, 'socks'],
    [2, 'pants'],
    [1, 'shoes'],
    [5, 'hats']];

var result = {};
for (var i = 0; i < current.length; i++) {
     result[current[i][1]] = current[i][0];
}

// show result in snippet
document.write(JSON.stringify(result));

Answer 3

使用[].forEach.call()：

＆＃13;

 var current = [
   [4, 'socks'],
   [2, 'pants'],
   [1, 'shoes'],
   [5, 'hats']
 ];

 var res = {};

 [].forEach.call(current, function(el) {
   res[el[1]] = el[0];
 });

console.log(res);

var html = document.getElementById("result");
result.innerHTML = JSON.stringify(res);

＆＃13;

<div id="result"></div>

＆＃13;

二维数组成一个对象

3 个答案: