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Re: What is the main difference between a script and a procedure? [message #56180 is a reply to message #56105]

Thu, 04 October 2007 15:45

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Wed, 03 Oct 2007 07:40:49 -0600, David Fanning wrote:

> mystea writes:
>
>> As far as I can tell, a script:
>> 1. Can't accept any arguments and can't take any extended loops.
>> 2. It can recognize any variable that exists in the current session
>> because it behaves just like a a list of commands in sequence.
>>
>> On the other hand, a procedure:
>> 1. Can accept arguments, but can't recognize any variables which exist
>> in current IDL session.
>
> What you are calling a "script", most people call a
> "batch file". This is a way to execute a series of
> commands "as if" you were typing them at the IDL
> command line. Since this is just about the most limited
> way of using IDL, batch files are typically used infrequently.

I use batch files as IDL equivalents of #include statements, to include
frequently needed code, e.g. common block definitions, ala:

pro mypro,a,b,c
@my_common
my_common_var=2
end

So they aren't entirely useless.

JD

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[Message index]

		Re: What is the main difference between a script and a procedure? By: David Fanning on Wed, 03 October 2007 06:40
		Re: What is the main difference between a script and a procedure? By: mystea on Fri, 05 October 2007 02:08
		Re: What is the main difference between a script and a procedure? By: JD Smith on Thu, 04 October 2007 15:45

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