How to add dynamic attribute to an Object in JavaScript?

Question

How to add dynamic attribute to an object, for example I use the following code to add index (index)attribute to myObj, index is a variable.

var myObj={};
for(var index=0; index<10; index++){
   myObj[index]='my'+index;
}

But it does not work...

That should work, but you're not very clear about what you expect the result to be. — Pointy
– Pointy, Commented Jun 8, 2011 at 14:49
This has nothing to do with Javascript events or with jQuery. And, so far as I can tell, it does work. What's the problem? — lonesomeday
– lonesomeday, Commented Jun 8, 2011 at 14:49

Pointy · Accepted Answer · 2011-06-08 14:50:12Z

1

If what you really want is for "myObj" to have properties like "my0", "my1", through "my10", then what you want is

for (var index = 0; index < 10; ++index)
  myObj['my' + index] = something;

answered Jun 8, 2011 at 14:50

Pointy

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Comments

mplungjan · Accepted Answer · 2011-06-08 14:55:33Z

0

Instead of creating an object with {}, use [] since you are creating a simple array.

var myObj=[];
for(var index=0; index<10; index++){
   myObj[index]='my'+index;
}

answered Jun 8, 2011 at 14:55

mplungjan

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sudipto · Accepted Answer · 2011-06-08 15:30:55Z

0

May you can try using :

myObj[index+""]='my'+index;

answered Jun 8, 2011 at 15:30

sudipto

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kroehre · Accepted Answer · 2011-06-08 15:55:10Z

0

You can't use a number as a property name in JavaScript in the same way you use a string.

Using myObj[1] will return the property value you're looking for, but myObj.1 will not.

It would be best to use a string like @Pointy and @sudimail recommended.

answered Jun 8, 2011 at 15:55

kroehre

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