Re: [Audacity-nyquist] How do I create a local instead of a global variable?

[<edg...@we...>]

aud...@li... schrieb am 03.04.05 03:22:14:
> 
> I want to replace many instances of setting global variables
> containing sound (using setq) with let. I have looked at several
> examples of code but don't understand how to use let.
> 
> If for example I have
> 
> (setq variable-name expression)
> 
> how would I convert that global variable code into local variable
> code using let?
> 
> Thanks very much
> 
> David
>

Hi David

Learning Nyquist myself I found today:
Examples from bandfx.lsp 
(Nyquist 2.30 Multiband-Tutorial)
 
(let (variable-name variable-name2) 
; declares one or more local variables
  (code)  ; one or more lines of code  
  variable-name) ; the last line is return-value
   
the variables bound with let are only valid within the code
lines between let and the closing paren after the return value
  
if you do not initalize your variables they are initialized
with NIL otherwise you have to write  
 
(let (variable-name expression variable-name2 expression2)
  (code)
  variable-name) ; return-value
   
Because I do not know wether you have the Nyquist 2.30 
Tutorials and the examples in there are spread over twenty 
files (or something) I will send you all Tutorials in one
PDF per Mail. I think this is easier to listen to.
 
Roger may please correct this if I have explained it wrong
because I'm still learning myself.
   
Thanks to everybody - edgar



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