Access object class using a variable

Question

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Javascript - access object member when identifier string is stored in a var
javascript object, access variable property name?

I define an object:

var TitlePrice = new Object();
TitlePrice.noEdit   = 1;
TitlePrice.BW       = 2;
TitlePrice.PicPaint = 3;

Now I define a variable, e.g.:

var curren="BW";

How can I access TitlePrice.BW using current variable?, e.g.:

TitlePrice.$current

javascript. `var` does not exist in Java. – Romain Linsolas Oct 23 '12 at 21:15 — Romain Linsolas, Oct 23 '12 at 21:15
Did you try with TitlePrice[current]?! – Adriano Repetti Oct 23 '12 at 21:18 — Adriano Repetti, Oct 23 '12 at 21:18

score 1 · Answer 1 · answered Oct 23 '12 at 21:32

1

Use the array access notation.

var a = {};
a.BW = 2;

var b = 'BW';
a[b] === 2

answered Oct 23 '12 at 21:32

J. K.

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yes, this is what i tried to do – dandan Oct 29 '12 at 10:46

score -1 · Answer 2 · answered Oct 23 '12 at 21:21

I'm not sure what you are trying to do. But,

var curren="BW";

is creating a variable and assigning the string "BW" to it.

Also,

TitlePrice.$current

will return undefined because you are not defining a property on your object named $current. If you want the value of TitlePrice.BW to be assigned to the variable curren, you will need to do something like this:

var curren = TitlePrice.BW;

Access object class using a variable

2 Answers2