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September 2003, Week 4

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
"VANCE,JEFF (HP-Cupertino,ex1)" <[log in to unmask]>
Reply To:
VANCE,JEFF (HP-Cupertino,ex1)
Date:
Mon, 22 Sep 2003 18:13:00 -0700
Content-Type:
text/plain
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Keven writes:

...
> >3. a function that does not explicitly return a value will either be
> >an error (dislike), or will be void (prefer).  A void function would
> >simply be executed inline and erased from the command line image.
>
> So a function called from the CI
>    :myfunc()
> would just throw away the result.

You could not execute a function this way, just like you cannot
execute the WORD() function by:
    :word("ab cd e fgh i")

You need to put the function in a command that expects an
expression, like SETVAR, IF, WHILE, CALC.  Or, since ![expr]
works for all commands, you can embed a user function as:
    SomeCICommand ![myfunc()]

...
> >7. function precedence order is that predefined functions take
> >precedence over user defined functions. So, if you define your own
> >"string" function, you need to name it some other name besides "STR",
> >since the CI will always execute the built-in str() function.
>
> hmmm, it may be nice to "replace" a CI function, much like UDC's
> can replace CI commands.

I agree and I've considered this. Please read my reply to Jim Kramer
(loops, that might have been only to the OpenMPE list, so I will
forward that reply to 3000-L). After reading my reply let me know
your opinion.

> Then again, I could change all my scripts to use my string function
> instead of STR, and my script can optionally call STR or do
> something new.

Correct.

thanks,
 Jeff

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