如果你想使用迭代对象的一个属性作为键，例如:

// from:
const arr = [
    {
        sid: 123,
        name: 'aaa'
    },
    {
        sid: 456,
        name: 'bbb'
    },
    {
        sid: 789,
        name: 'ccc'
    }
];
// to:
{
  '123': { sid: 123, name: 'aaa' },
  '456': { sid: 456, name: 'bbb' },
  '789': { sid: 789, name: 'ccc' }
}

Use:

const result = arr.reduce((obj, cur) => ({...obj, [cur.sid]: cur}), {})

快速和肮脏的#2:

var i = 0
  , s = {}
  , a = ['A', 'B', 'C'];

while( i < a.length ) { s[i] = a[i++] };

如果你正在使用jquery:

$.extend({}, ['a', 'b', 'c']);

使用javascript#forEach可以做到这一点

var result = {},
    attributes = ['a', 'b','c'];

attributes.forEach(function(prop,index) {
  result[index] = prop;
});

ECMA6:

attributes.forEach((prop,index)=>result[index] = prop);

为了完整性，ECMAScript 2015(ES6)正在传播。将需要一个转译器(Babel)或至少运行ES6的环境。

console.log ( {…['a'， 'b'， 'c']} ）

这是我刚刚写的递归函数。这很简单，而且效果很好。

// Convert array to object
var convArrToObj = function(array){
    var thisEleObj = new Object();
    if(typeof array == "object"){
        for(var i in array){
            var thisEle = convArrToObj(array[i]);
            thisEleObj[i] = thisEle;
        }
    }else {
        thisEleObj = array;
    }
    return thisEleObj;
}

下面是一个例子(jsFiddle):

var array = new Array();
array.a = 123;
array.b = 234;
array.c = 345;
var array2 = new Array();
array2.a = 321;
array2.b = 432;
array2.c = 543;
var array3 = new Array();
array3.a = 132;
array3.b = 243;
array3.c = 354;
var array4 = new Array();
array4.a = 312;
array4.b = 423;
array4.c = 534;
var array5 = new Array();
array5.a = 112;
array5.b = 223;
array5.c = 334;

array.d = array2;
array4.d = array5;
array3.d = array4;
array.e = array3;


console.log(array);

// Convert array to object
var convArrToObj = function(array){
    var thisEleObj = new Object();
    if(typeof array == "object"){
        for(var i in array){
            var thisEle = convArrToObj(array[i]);
            thisEleObj[i] = thisEle;
        }
    }else {
        thisEleObj = array;
    }
    return thisEleObj;
}
console.log(convArrToObj(array));

结果: