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Common or not common [message #10281]

Fri, 14 November 1997 00:00

morisset
Messages: 17
Registered: October 1997

Junior Member

Helo,

I read already lot of times David (and others) speaking
about "never use common" (except to save values used in multiple
call of the _same_ routine). I cannot understand how I could
develop my codes without any common. I have a lot of routines
that have to deal with a lot of variables (of various type).

I can't imagine passing 25 or more parameters to the routines.
And with the previous version of IDL, the parameters where
limited in number.

And what happens when I decide to add one other parameter to
one routine? I have to check all the call to the routine
to be sure that the new parameter is passed
(I can't wait for IDL to do it itself ;-) ?

I use parameters when I want to deal with procedure or
function I want to apply to different variables. But when
in every routines/functions of the program
the spectrum, lambdas, corrections of
different types and a lot of other things,
have always the same name, it's easier and safer
to pass them via a common, no?

Can somebody explain me what I miss?

C. Morisset, IAG/USP, Brasil
http://www.iagusp.usp.br/~morisset/idl

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[Message index]

		Common or not common By: morisset on Fri, 14 November 1997 00:00
		Re: Common or not common By: mgs on Wed, 19 November 1997 00:00
		Re: Common or not common By: morisset on Mon, 17 November 1997 00:00
		Re: Common or not common By: davidf on Fri, 14 November 1997 00:00
		Re: Common or not common By: Liam Gumley on Fri, 14 November 1997 00:00

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