如何在Javascript对象中添加一个变量，该变量在for [duplicate]中发生变化

This question already has an answer here:

这个问题在这里已有答案:

Object with another's object's property as a key 1 answer

将另一个对象的属性作为关键1答案

Subs.find({ }).forEach(function(div){
 var sub_type = div.type ;
 var sub_TO = div.text ;
 var man = div.arn;
 var obj = {man: []};
 obj.man.push({"type": sub_type, "TO" :sub_TO});
 var json = JSON.stringify(obj);
 console.log(json);
})

here is my problem I want man who is in obj to be a variable and change each time the forEach() runs and i don't understand why when i log the obj i see man instead of the value my variable.

这是我的问题我希望obj中的人变成一个变量并且每次运行时更改forEach()并且我不明白为什么当我记录obj时我看到man而不是值my变量。

An other question. if it is posible to use a variable for the man how should i do the line obj.man.push({"type": sub_type, "TO" :sub_TO}); ?

另一个问题。如果可以为男人使用变量,我应该怎么做obj.man.push行({“type”:sub_type,“TO”:sub_TO}); ?

1 个解决方案

#1

You can use new initializer syntax that lets you use an expression for the key. Use square brackets for this:

您可以使用新的初始化程序语法,该语法允许您使用表达式作为键。使用方括号:

var obj = {[man]: []};

Or for legacy browsers, create the object first, then use the brackets to evaluate the expression.

或者对于旧版浏览器,首先创建对象,然后使用括号来计算表达式。

var obj = {};
obj[man] = [];

Then use the typical square brackets when accessing the property.

然后在访问该属性时使用典型的方括号。

obj[man].push({"type": sub_type, "TO" :sub_TO});

#1