topic Re: Retrieving parameter value with parameter name as string in Libraries & objects

Retrieving parameter value with parameter name as string

Anonymous — Fri, 03 Jun 2016 03:52:32 GMT

I am trying to use a string as a parameter reference:

I have a parameter called

param_1

which is a boolean variable
I then generate the parameter name in a loop
ie.

	
i = 0
FOR i=1 TO 6 STEP 1
	mystring = 'param_' + str(i,1,0)
NEXT i

I then want to use the generated param name in the same loop
( mystring = "param_1" )
(which does not work)

	
i = 0
FOR i=1 TO 6 STEP 1
	mystring = 'param_' + str(i,1,0)

        if mystring = 1 Then
                            ! // code related to if checkbox is checked (TRUE/ON/1)
		else
                            ! // code related to if checkbox is NOT checked (FALSE/OFF/0)
		endif
NEXT i

The code below does work!!

	
i = 0
FOR i=1 TO 6 STEP 1
	mystring = 'param_' + str(i,1,0)

        UI_INFIELD mystrng, base_posx, base_posy, 20, 20

NEXT i

Given that I can use the generated parameter name with the UI_INFIELD command, I figured there must be a way to use it in an IF statement.
Could anyone point me in the right direction please?

Re: Retrieving parameter value with parameter name as string

Bruce — Fri, 03 Jun 2016 07:30:26 GMT

Matrices are your friend in this situation. You can't use a loop to create a variable name (as you can in other languages), but you can populate and query / test the contents of a matrix.

DIM arrayName[] is how you declare (or DIM arrayName[][] for a 2-dimension array)

Hope this helps.

Re: Retrieving parameter value with parameter name as string

Anonymous — Tue, 07 Jun 2016 02:30:27 GMT

Bruce wrote:
Matrices are your friend in this situation. You can't use a loop to create a variable name (as you can in other languages), but you can populate and query / test the contents of a matrix.

DIM arrayName[] is how you declare (or DIM arrayName[][] for a 2-dimension array)

Hope this helps.

Thanks for this Bruce,
Ended up following this advice and just passing all the values from the parameters into an array that could be looped through.

It's a shame GDL can't handle parsing strings as param names, this work around works though!