[tpm] Regex question

Mike Stok mike at stok.ca
Tue Jul 8 08:22:02 PDT 2008

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"

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

<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"



Mike Stok <mike at stok.ca>

The "`Stok' disclaimers" apply.

More information about the toronto-pm mailing list