a variable 'variable name' in script

sandyn · **Posted:** May 6th, 2007, 9:20 am

Just wondered if there is another way in scripting to create a variable name from passed parameters???
I use an array, which works fine, but is there another way?

function ReadCounter(Num)
{
ReadCount= new Array(2)
ReadCount[Num]=MyDLL.CallFn("ReadCounter","false","ulong","ulong",Num)
Debug.trace(ReadCount[Num]+"\n")
}

mackavi · **Posted:** May 7th, 2007, 9:09 am

Sorry sandyn slightly lost,

Might be coz, I don't have VI - yet, but the script would appear to read the result of the CallFn into the ReadCount array cell as specified by Num.

You question however, seems to be asking how to create a variable from the passed parameter IE I pass the string 'myVar' and then I use this to hold information

myVar = 'Information in here'

Mack

Reemski · **Posted:** May 7th, 2007, 2:12 pm

Hi Sandyn,

You could use eval for that. An example:

Code:

var counter = 10
for( i=0; i < 5 ; i++ ) {
    counter += 1 
    eval(  'var_' + i + ' = counter' )
}

sandyn · **Posted:** May 7th, 2007, 4:51 pm

sorry....I didn't explained myself very well---basically, I was just trying to concatenate a string and a variable to create a new variable name...for example----value1, value2, value3 where the numerical part was from a loop count, so I'm trying to create ("value"+num)...where num is 1,2,3 from the loop count.
I just wondered if it can be done without using an array?

I'm not sure if the eval function would do that???

Reemski · **Posted:** May 8th, 2007, 10:11 am

But do the string-values come from an array, or somewhere else?

Because eval can create new variables from a string and numbers:

Code:

var array = new Array('first', 'second', 'third', 'fourth')

for( i=0; i < array.length ; i++ ) 
{ 
    eval(  'var ' + array[i] + i + ' = \'value\' ' ) 
} 

sandyn · **Posted:** May 9th, 2007, 2:35 pm

Thanks Reemski. That does what I want!!

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a variable 'variable name' in script

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