RE: [FWP] Perl Card Games

[Larry Rosler <lr@hpl.hp.com>]

> From: Uri Guttman [mailto:uri@sysarch.com]
> Sent: Wednesday, August 04, 1999 21:39
> To: jdporter@min.net
> Cc: fwp@technofile.org
> Subject: Re: [FWP] Perl Card Games
> 
> >>>>> "JP" == John Porter <jdporter@min.net> writes:
> 
>   JP>         @a = (undef) x 5;  # any value; it will get overwritten.
>   JP>         for ( @a ) {
>   JP> 		@$_ = (....);
>   JP>         }
> 
>   JP> Now, as for the loop problem: why is the semantics of for as
>   JP> a statement modifier so different from the normal for?
> 
> i still don't get what you expect @$_ to be? explain it in english if
> you can. it looks like a symref. if it is meant to be an array ref
then
> you should initialize @a with ([]) x 5. and i don't think there is any
> difference in the semantics of a for loop vs. statement modifier in
this
> case. you just never had a proper array ref in $_.

I haven't read everything in this discussion yet.  (Who could and get
anything else done? :-)  However...

As someone pointed out already, that produces five copies of one
reference.  More likely:

    my @a = map [] => 1 .. 5;
 
...

-- 
Larry Rosler
Hewlett-Packard Laboratories
http://www.hpl.hp.com/personal/Larry_Rosler/
lr@hpl.hp.com 

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