javascript: Access object properties through variable

Question

I want to access a Javascript Object dynamicly.

Example:

example: { 
    name: "dev.pus", 
    year: 2012, 
    os: "linux" 
}

This isn't anything new. Now you normaly can access properties of the "example" with:

console.log(example.name);
// or
console.log(example.year);

But what is if I want to take the attribute dynamicly? For example, another var (lets assume the user sets it) should decide which property we want:

var = "name";
console.log(example.var); // error
console.log(example[var]); // error

What is the way to go?

example[variable] should work. You're just choosing the worst name in the history of variable names... var is a reserved keyword in Javascript. — TheZ
– TheZ, Commented Jul 10, 2012 at 7:41

CD.. · Accepted Answer · 2012-07-10 07:42:52Z

3

Your example should work if you'll change your variable name (var is reserved).

var key = 'name';
console.log(example[key]);

You can also iterate over your object to get all keys:

for (var item in example){
    if (example.hasOwnProperty(item)){
      console.log(example[item]);
    }
}

http://jsfiddle.net/bC9XJ/

answered Jul 10, 2012 at 7:42

CD..

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1 Comment

dev.pus Over a year ago

Hi, I have updated the post. To the beginning I thought this was a Javascript issue but now this seems to be related with jquery. Maybe you remember the pattern from the other thread ;)

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