JavaScript 使用数组键/值对附加到对象
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JavaScript append to object using array key/value pair
提问by chris
I have an object that I build out dynamically example:
我有一个动态构建的对象，例如：
obj = {};
obj.prop1 = 'something';
obj.prop2 = 'something';
obj.prop3 = 'something';
With that I now have a need to take an item from an array and use it to define both the equivalent of "propX" and its value
有了这个，我现在需要从数组中取出一个项目并使用它来定义“propX”的等价物及其值
I thought if I did something like
我想如果我做了类似的事情
obj.[arr[0]] = some_value;
That, that would work for me. But I also figured it wouldn't the error I am getting is a syntax error. "Missing name after . operator". Which I understand but I'm not sure how to work around it. What the ultimate goal is, is to use the value of the array item as the property name for the object, then define that property with another variable thats also being passed. My question is, is how can I achieve it so the appendage to the object will be treated as
那，那对我有用。但我也认为我得到的错误不是语法错误。“. 运算符后缺少名称”。我明白，但我不知道如何解决它。最终目标是使用数组项的值作为对象的属性名称，然后使用另一个传递的变量定义该属性。我的问题是，我怎样才能实现它，以便对象的附属物将被视为
obj.array_value = some_variable;
回答by Denys Séguret
Remove the dot. Use
删除点。利用
obj[arr[0]] = some_value;
I'd suggest you to read Working with objectsfrom the MDN.
我建议您阅读来自 MDN 的使用对象。
回答by Mike Hogan
You could try
你可以试试
obj[arr[0]] = some_value;
i.e. drop the dot :)
即放下点:)
回答by Marryat
You are nearly right, but you just need to remove the . from the line:
你几乎是对的，但你只需要删除 . 从行：
obj.[arr[0]] = some_value;
obj.[arr[0]] = some_value;
should read
应该读
obj[arr[0]] = some_value;
obj[arr[0]] = some_value;
