[tpm] Regex question

[Mike Stok]

On Jul 8, 2008, at 11:00 AM, Madison Kelly wrote:

> Hi all,
>
>  I've got a simple problem I often come across, and I've got a way  
> to make it work. However, I've always felt there must be a more ...  
> elegant way of doing it.
>
> For example, let's say I want to copy a variable and strip a bit off  
> the end;
>
> my $foo="ABC-987-01";
> my $bar=$foo;
> $bar=~s/(\w+-\d+)-\d+/$1/;
> # $bar now 'ABC-987'.
>
> That's three lines. Is there a way to do this in one line?  
> Specifically, is there a way to assign '$1' to a new variable in one  
> go?


In the debugger:

   DB<1> $foo="ABC-987-01"

                                                                                   DB 
<2> ($bar = $foo) =~ s/(\w+-\d+)-\d+/$1/

                                                                                   DB 
<3> x $foo, $bar
0  'ABC-987-01'
1  'ABC-987'

or if you *really* want 1 line:

   DB<1> (my $bar = my $foo = "ABC-987-01") =~ s/(\w+-\d+)-\d+/$1/;  
print "$foo\n$bar"
ABC-987-01
ABC-987

Mike

-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.