LiveCode Forums.

Posted: **Sat Jun 11, 2016 6:41 pm**

Trying to learnLive code and cannot do even the most simple of programming features ...

I have a single stack and want return a varA from a function disp_to_acceleration and put it into a text field i call AccelValue
my goal is to create a collection of functions . click a button and have it populate different text boxes.

Stuck on the first one.

on mouseUp
put field "FreqValue" into varF -- this works
put field "DispValue" into varD -- this works
let varA= (disp_to_acceleration(varF,varD), stack "Dynamic Conversion") -- this fails
put varA into field "AccelValue"
end mouseUp

with error
button "Button": execution error at line 6 (Chunk: can't find stack), char 1

There are two tabs and one of them says stack "Dynamic Conversion", which is were my function lives.

function disp_to_acceleration(varF,varD)
return varF*varD
end disp_to_acceleration

any help is appreciated. This is the simplist of things to do , but, totally escapes me in LiveCode.

Posted: **Sat Jun 11, 2016 6:54 pm**

Hi mkholcomb@aol.com,

1. welcome to the forum!

2. to get used to Livecode, I recommend to check these stacks:
http://www.hyperactivesw.com/revscriptc ... ences.html

For your problem, declare the function like this:

Code: Select all

function disp_to_acceleration var1,var2
  return var1*var2
end disp_to_acceleration

And use it like this:

Code: Select all

on mouseUp
  put field "FreqValue" into varF -- this works
  put field "DispValue" into varD -- this works
  ## let varA= (disp_to_acceleration(varF,varD), stack "Dynamic Conversion") 
  ##  this fails, because it is Basic or something like this :-)

  ## Correct use of function in LC
  ## put disp_to_acceleration(varF,varD) into varA
  ## put varA into field "AccelValue"

  ## Or shorter:
  put disp_to_acceleration(varF,varD) into field "AccelValue"
end mouseUp

Best

Klaus

Posted: **Sun Jun 12, 2016 1:25 pm**

You have programmed before.

When you wrote

Code: Select all

"let varA= (disp_to_acceleration(varF,varD), stack "Dynamic Conversion") -- this fails"

Where did you get the idea that "let" was a native word? I am not chastising, just trying to make a point. A new language requires learning a new vocabulary and syntax. Take Klaus advice and dig into the basics. You are at an advantage in that you already have coded. You are at a disadvantage in that you need to unlearn quite a bit.

Craig Newman

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