Re: goto command

[Noah Ganter]

The reason why the goto command is not generally used in perl (and other
languages) is that it does not force the developer to have a theoretical
framework for the program. It creates 'spagetti code' where a person working
on the code or trying to understand what the developer has done has to
follow a rabbit tunnel of goto directions. A direct alternative is using sub
procedures which not only perform the same goto like movement, but can use
parameters and return values as well.

Thomas Browner [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
 Does perl have a goto command. For example if you tell scrip to do
 something and it returns a 1 then it should go to a block of code that
 does something else.

 Thanks,
 Thomas Browner






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Re: goto command

[wolf blaum]

For Quality purpouses, Thomas Browner 's mail on Thursday 29 January 2004 
18:46 may have been monitored or recorded as:

 Does perl have a goto command. For example if you tell scrip to do
 something and it returns a 1 then it should go to a block of code that
 does something else.

Not talking about style (but in the TIMTOWTDI spirit):

from perldoc -f goto:

goto LABEL
   goto EXPR
   goto NAME
   The goto-LABEL form finds the statement labeled
   with LABEL and resumes execution there.  It may
   not be used to go into any construct that requires
   initialization, such as a subroutine or a fore-
   ach loop.  It also can't be used to go into a
   construct that is optimized away, or to get out of
   a block or subroutine given to sort.  It can be
   used to go almost anywhere else within the dynamic
   scope, including out of subroutines, but it's usu-
   ally better to use some other construct such as
   last or die.  The author of Perl has never
   felt the need to use this form of goto (in Perl,
   that is--C is another matter).  (The difference
   being that C does not offer named loops combined
   with loop control.  Perl does, and this replaces
   most structured uses of goto in other lan-
   guages.)

hth, wolf


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Re: goto command

[Rob Dixon]

Thomas Browner wrote:

 Does perl have a goto command. For example if you tell scrip to do
 something and it returns a 1 then it should go to a block of code that
 does something else.

Yes. But I've never seen a case where I think it should be used.

Perl isn't a scripting language. (Although it can be, just like
it can be most things.)

If you want help, then please explain what you're trying to do. Then
we will explain how.

Rob



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RE: goto command

[Paul Kraus]

Sub dothissubroutine {
Do something
If return this 
Else return this
}   

My $result = dothissubroutine
If $result = this 
}elsif 
This
}else{
This
}



 Paul Kraus
 ---
 PEL Supply Company
 Network Administrator

 -Original Message-
 From: Thomas Browner [mailto:[EMAIL PROTECTED]
 Sent: Thursday, January 29, 2004 12:46 PM
 To: [EMAIL PROTECTED]
 Subject: goto command
 
 Does perl have a goto command. For example if you tell scrip to do
 something and it returns a 1 then it should go to a block of code that
 does something else.
 
 Thanks,
 Thomas Browner
 
 
 
 
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 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]
 http://learn.perl.org/ http://learn.perl.org/first-response



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RE: goto command

[Wagner, David --- Senior Programmer Analyst --- WGO]

Why not just make it a sub, so you perform the sub and continue on from there:

if ( sub1() ) {
   # return of true
   sub2();
 }else {
   # return false, so do something else or nothing
 }

Wags ;)

-Original Message-
From: Thomas Browner [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 29, 2004 09:46
To: [EMAIL PROTECTED]
Subject: goto command


Does perl have a goto command. For example if you tell scrip to do
something and it returns a 1 then it should go to a block of code that
does something else.

Thanks,
Thomas Browner




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