Create Javascript Variable with name of a variable and string combined

Question

I cant seem to solve this problem, heres what I have...

vid1=0;
vid2=0;
vid3=0;

num=1;

'vid'+num = 1;
// vid1=1;

I want to create the variable based on the number, so if the number is 2, then make a variable by the name of vid2 and set it equal to 1.

PS: This is my first time on stackoverflow, so sorry if I made any mistakes in terms of tradition on this website =) And thannks in advanced.

possible duplicate of Javascript - variable value is name of another variable — epascarello
– epascarello, Commented Jan 21, 2013 at 1:50

Joseph Silber · Accepted Answer · 2013-01-21 01:44:26Z

5

If you're in the global namespace, use this:

window['vid' + num] = 1;

but this is a really good use case for an array:

var numbers = [0, 0, 0];
var num = 1;

numbers[num] = 1;

answered Jan 21, 2013 at 1:44

Joseph Silber

221k59 gold badges369 silver badges292 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

And where is the eval option?

@RobG - I don't go down the sewer drain without full body anti-toxic protective clothing. You get me that, and I'll get you eval.

I just think that for the sake of completeness, it should be mentioned (and warned against of course).