Question

Create variable name with string value in JavaScript

Asked by: treyjeff

I have a bunch of custom fields but sometimes the index starts at a different number. So down below I'm trying to alert(myVariable);

So I want to take a string: myVariable and add another part of a string on "1" and be able to alert(myVariable1) and have it spit out the value of that variable.

I know there is a name for this but I can't recall it :( and PHP allows me to do it by adding {}.

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Asked On
2007-08-22 at 09:55:07ID22779971
Tags

variable

,

javascript

,

name

,

string

,

create

Topic

JavaScript

Participating Experts
2
Points
125
Comments
4

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Answers

 

by: TNamePosted on 2007-08-22 at 10:01:25ID: 19747854

Hi, have you tried eval()?

  var a1=10;  
  alert(eval('a'+1));

should alert 10.

 

by: treyjeffPosted on 2007-08-22 at 10:09:41ID: 19747905

Will try that right now...

 

by: TNamePosted on 2007-08-22 at 10:10:54ID: 19747911

Another example with a field, where "field1" is the name/id of an input field in the document's first form:

  var a = 'field';      
  alert( document.forms[0][a+1].value );

 

by: VincentPugliaPosted on 2007-08-22 at 13:13:11ID: 19749320

Hi,

<script type='text/javascript'>

function makeObj(str)
{
  window[str] = new Object();
  document.write(str + '<br />')
}

for (var i = 0; i < 10; i++)
makeObj('theObj'+i);
</script>

20120131-EE-VQP-002

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