[ale] Perl and $_ ?

[Adam Teja]

...what Mark said, $_ is a default variable, here are a few one liner
examples that I thought may help (just happended to have a Perl book
out)... as you can probably figure out; you can, in most cases,
explicitly reference the $_ variable...

while( <FILEHANDLER> ) = while( $_ = <FILEHANDLER> )
chomp; = chomp $_;
print "ok" if /$pat/; = print "ok" if $_ =~/$pat/;
s/$pat/$repl/; = $_ =~ s/$pat/$repl/; 
tr/ \t/\n/; = $_ =~ tr/ \t/\n/; 
print; = print $_;
split /$sep/; = split /$sep/, $_;
foreach (@list) = foreach $_ (@list)

hope this helps, 
Adam



---"David S. Jackson" <dsj at dsj.net> wrote:
>
> Okay, I'm just chugging through "Learning Perl" and came to Chapter
6 and
> the $_ variable.  I thought I understood it, but now that I'm chugging
> through Chapter 7 (Regular Expressions) I'm not so sure.
> 
> Could someone explain it to me in their own words with simple
examples,
> maybe? 
> 
> TIA!  :-)
> 
> --
> David S. Jackson                           http://www.dsj.net
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> "You may satisfy all your senses and still not be satisfied."
>                         --Edward S. Martin
> 

==
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