我正在用JavaScript构建一些对象并将这些对象推送到一个数组中,我正在存储我想要在变量中使用的键,然后像这样创建我的对象:
var key = "happyCount";
myArray.push( { key : someValueArray } );
但是当我尝试检查每个对象的对象数组时,键是"key"
而不是变量键的值。有没有办法从变量设置键的值?
小提琴以获得更好的解释: http://jsfiddle.net/Fr6eY/3/
答案 0 :(得分:1218)
您需要先创建对象,然后使用[]
进行设置。
var key = "happyCount";
var obj = {};
obj[key] = someValueArray;
myArray.push(obj);
2018年更新:
如果您能够使用ES6和Babel,则可以使用以下新功能:
{
[yourKeyVariable]: someValueArray,
}
答案 1 :(得分:244)
尝试这样的事情(在答案结尾处查看ES6示例)
var yourObject = {};
yourObject[yourKey] = "yourValue";
console.log(yourObject );
示例:强>
var person = {};
var key = "name";
person[key] /* this is same as person.name */ = "John";
console.log(person); // should print Object { name="John"}
var person = {};
var key = "name";
person[key] /* this is same as person.name */ = "John";
console.log(person); // should print Object { name="John"}
在ES6中,您可以这样做。
var key = "name";
var person = {[key]:"John"};
console.log(person); // should print Object { name="John"}
var key = "name";
var person = {[key]:"John"};
console.log(person); // should print Object { name="John"}