Variable is treated as a string in JavaScript

Question

I'm trying out the node-mysql module on node js. What I want to do is to be able to come up with an object like this:

{'room1':'Room 1','room2':'Room 2','room3':'Room 3'}

Here's the code:

var boom  = results;
   var rooms = [];
   var index = 0;
   var name = 'session';
    for(var b in boom){
        var ses = name + index;
        rooms[b] = {ses : boom[b]['ses_title']};
        index++;
    }

The ses variable is being treated as a string in the code above. And I end up with something like this:

[{ses : 'class session'} , {ses : 'team session'}]

KooiInc · Accepted Answer · 2012-03-21 05:49:57Z

2

You can't assign key names like that. Use bracket notation and it should work:

var boom  = results;
var rooms = [];
var index = 0;
var name = 'session';
for(var b in boom){
 rooms[b] = {};
 rooms[b][name + index] = boom[b]['ses_title']};
 index += 1;
}

answered Mar 21, 2012 at 5:49

KooiInc

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David Wolever · Accepted Answer · 2012-03-21 05:49:25Z

2

You'll need to use something like:

rooms[b] = {};
rooms[b][ses] = boom[b]['ses_title'];

This is because keys in object literals are always interpreted literally, not evaluated.

answered Mar 21, 2012 at 5:49

David Wolever

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