--- On Tue, 24/11/09, Shawn H Corey <shawnhco...@gmail.com> wrote:
> From: Shawn H Corey <shawnhco...@gmail.com>
> Subject: Re: 答复: Regex to get last 3 digits of a number.
> To: "gaochong" <zjgaoch...@gmail.com>
> Cc: "'John W. Krahn'" <jwkr...@shaw.ca>, "'Perl Beginners'"
> <beginners@perl.org>
> Received: Tuesday, 24 November, 2009, 8:26 PM
> gaochong wrote:
> > But I think substr is better .
> >
> > my $str="0000000000000111";
> > my $r=substr ($str,-3);
>
> TimTowTdi (there is more than one way to do it):
>
> my $n = "0000000000000111";
> my $last_3_chars = join('',(split(//,$n))[-3..-1]);
The worst way, :-)
split is much slower than others.
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