Javascript 如何使用动态密钥访问对象？
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How to access object using dynamic key?
提问by Venkat Papana
How to access an object using a variable as key. Here is my code sample:
如何使用变量作为键访问对象。这是我的代码示例：
var o = {"k1": "111", "k2": "222"};
alert(o.k1); //working fine
var key = "k"+1; alert(key); // k1
alert(o.key); //not working
回答by OverZealous
You can access objects like arrays:
你可以访问像数组这样的对象：
alert(o[key]);
回答by Andrius Virbi?ianskas
Change the last line to: alert(o['k1']);or alert(o[key]);where keyis your dynamically constructed property key.
将最后一行更改为：alert(o['k1']);或动态构造的属性键alert(o[key]);在哪里key。
Remember you can access object's properties with array notation.
请记住，您可以使用数组表示法访问对象的属性。
回答by Lance
Consider using a for...inloop
考虑使用for...in循环
