javascript variable usage help

Question

Ok guys here's my dilemma, I just need some basic help... soo

if I have a set of variable say...

$h1 = ""
$h2 = ""
$h3 = ""
$h4 = ""

and i'm using a data attribute on the element, how can I use the number I pull to put into a string that acts as the variable name. so in the function below, you click a class item, it get's the value from the data attribute then I need to populate the #work_hold div with the corresponding variable. If I do what I have below, the $tme acts as a string and doesnt work. any ideas?

$(".box").click(function(){
var atr = $(this).attr("data-bsel"); 
$tme = '$h'+atr;
$('#work_hold').html($tme);
  });

This question is similar to: Is there a JavaScript equivalent of PHP’s “variable variables”?. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem. — dumbass
– dumbass, Commented Oct 12, 2024 at 8:53

Marc B · Accepted Answer · 2011-08-25 20:01:24Z

2

You want an array:

var h = [];
h[0] = ...;
h[1] = ...;
h[2] = ...;
...

$tme = h[atr];

You do NOT want to build variables dynamically. That just leads to utterly icomprehensible and impossible to debug code.

answered Aug 25, 2011 at 20:01

Marc B

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1 Comment

Diodeus - James MacFarlane Over a year ago

I like this answer best. Tackle how to use arrays before learning objects.

Joe · Accepted Answer · 2011-08-25 20:06:16Z

0

use javascript objects:

var nameSpace = {"$h1": 109};

$(".box").click(function(){
    var atr = $(this).attr("data-bsel"); 
    $tme = nameSpace['$h'+atr];
    $('#work_hold').html($tme);

});

edited Aug 25, 2011 at 20:06

answered Aug 25, 2011 at 20:01

Joe

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2 Comments

Greg Thompson Over a year ago

the first one work but I'm definitely going to read about these objects cause they'll prob help me in the future. Thanks

Joe Over a year ago

developer.mozilla.org/en/JavaScript/Reference/Global_Objects/… here is a good example of objects in javascript

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