Javascript 如何根据键从对象文字中返回值？
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How to return a value from an Object Literal based on a key?
提问by user357034
I have an array as follows. How would I retrieve the value of a specific key and put that value in a variable?
我有一个数组如下。我如何检索特定键的值并将该值放入变量中？
var obj = {"one":"1","two":"3","three":"5","four":"1","five":"6"};
So for instance if I want to get the value of "three" how would I do it in javascript or jQuery?
因此，例如，如果我想获得“三”的值，我将如何在 javascript 或 jQuery 中做到这一点？
回答by Nick Craver
You can do this via dotor bracketnotation, like this:
var myVariable = obj.three;
//or:
var myVariable = obj["three"];
In the second example "three"could be a string in another variable, which is probablywhat you're after. Also, for clarity what you have is just an object, not an array :)
在第二个示例中"three"可能是另一个变量中的字符串，这可能是您所追求的。另外，为了清楚起见，您所拥有的只是一个对象，而不是数组:)
回答by Boshika Tara
Here is a solution (by the way this is an object not an array):
这是一个解决方案（顺便说一下，这是一个对象而不是数组）：
var obj = {"one":"1","two":"3","three":"5","four":"1","five":"6"};
var myFunc = function(thisObj, property) {console.log(obj[property])};
myFunc(obj, "two");
//Output will be 3
You can also do this more easily using the _.pluckfunction from the Underscore JS library.
您还可以使用_.pluckUnderscore JS 库中的函数更轻松地执行此操作。
