How to access object using dynamic key? [duplicate]

Question

How to access an object using a variable as key. Here is my code sample:

var o = {"k1": "111", "k2": "222"};
alert(o.k1); //working fine
var key = "k"+1; alert(key); // k1
alert(o.key); //not working

OverZealous · Accepted Answer · 2011-08-03 05:01:53Z

158

You can access objects like arrays:

alert(o[key]);

answered Aug 3, 2011 at 5:01

OverZealous

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Comments

Andrius Virbičianskas · Accepted Answer · 2011-08-03 05:02:25Z

15

Change the last line to: alert(o['k1']); or alert(o[key]); where key is your dynamically constructed property key.

Remember you can access object's properties with array notation.

answered Aug 3, 2011 at 5:02

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John Slegers · Accepted Answer · 2016-03-09 09:45:01Z

2

Consider using a for...in loop

John Slegers

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answered Aug 3, 2011 at 4:59

Lance

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