get javascript value using a variable [duplicate]

Question

Possible Duplicate:
Get property of object in JavaScript

If I have the following:

var test ='bar';

var sections = {
    foo: 'value1',
    bar: 'value2',
    baz: 'value3'
};

I can use sections.foo to output 'value1'. Thats fine. However what if I want to get the value from sections according to another variable. Although this doesnt work what I mean is something like:

sections.test

Where test is the variable declared earlier, so the value returned would be 'bar'.

I dont work a awful lot with js so any help would be appreciated :) .. or if im approaching this the wrong way, feel free to say.

thanks

-->EDIT

The reason I wanted to do this is because the variable 'test' will be coming from the url and then I just wanted to load up further information depending on what page the user was on. :)

gen_Eric · Accepted Answer · 2011-12-28 19:03:53Z

4

Use [] instead of ..

sections[test] // value2

answered Dec 28, 2011 at 19:03

gen_Eric

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2 Comments

Jason McCreary Over a year ago

+1 for beating me while I was fiddling - jsfiddle.net/YgcDf

fl3x7 Over a year ago

Perfect. Cant believe it was so simple lol. Didnt realise it can just be accessed like an array. Thanks

kojiro · Accepted Answer · 2011-12-28 19:04:28Z

0

Where test is the variable declared earlier, so the value returned would be 'bar'.

if (sections.hasOwnProperty(test)) return test;

But what you probably meant was

if (sections.hasOwnProperty(test)) return sections[test];

answered Dec 28, 2011 at 19:04

kojiro

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Comments

Greg Bair · Accepted Answer · 2011-12-28 19:07:28Z

0

You can access it as an array index, like so: sections[test]. But, AFAIK, Javascript doesn't have any concept of variable variables, like how in php you can do $sections->$test.

answered Dec 28, 2011 at 19:07

Greg Bair

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