passing variables using the list function

[imoree]

Hello all;

i love the idea of using filemaker the way Matt does. makes sense to me, however the logic is very difficult compared to what i already knew in other languages.

If passing parameters using list. what r the rules or best practices for this.

e.g.

when user clicks on my button

1-> create a list first:: Button --> list ( "object =" & $object ; "row =" & $row;)

2-> main script:: Create a $var = (customfunction:: ( get (scriptparameter))

3-> if the $var was created, then do other logic

Also , can we get more "EXPLANATION" of the Let Function & Evaluate function as Matt uses these extensively & i love the use, it is just hard to wrap my head around the logic currently.

thanks everyone.

-imoree

[Fitch]

I don't see anything wrong with your parameter passing steps, although I don't know that List gives you any particular advantage since even without it, you're still passing name-value pairs, which gives you all you need.

I generally do this:

1. Pass params: e.g., "id=" & IDfield & ";name=" & nameField & etc.

2. In script, set variable $param to Get( ScriptParameter )

3. Set each variable: $id = GetNamed( $param ; "id" )

The GetNamed function is one I got from SeedCode years ago (I was given the OK to post it):

Let ( [

  string = Substitute ( Text ; [ """ ; "^^" ] ; [ " ;" ; ";" ] ; [ ";" ; "" ;" ] ;

								[ "= " ; "=" ] ; ["=" ; " = "" ] ; [PP ; "~~" ] ) & """ ;

  eval = Evaluate ( "Let ( [" &  string  & "] ;" & Name & " )" ) ;

  result = Substitute (  eval ; [ "^^" ; """ ] ; [ "~~" ; PP ]  )

  ] ;  // where you see PP, replace with paragraph symbol, BBcode is messing it up



  If ( result ="?" ; "" ; result )

)

I'm going to punt on explaining Let and Evaluate -- do you have a specific question?

Meanwhile, you should read this, and the discussion that follows (see Edit: the original discussion is gone):

http://www.geistinte...iple-parameters

(Is Petrowsky the Matt you're talking about?)

Edited February 16, 2012 by Fitch
sadly, the wonderful comments on Todd's post were lost when he changed his blog format.

[imoree]

Yes , Petrowsky is the Matt i am talking about.

thanks for the info,.