From: Phrogz <gavin@...>
Date: 2007-03-28T08:10:05+09:00
Subject: Re: Knocking Lines Out Of A Multiline String

On Mar 27, 10:12 am, "Rick DeNatale" <rick.denat...@gmail.com> wrote:
> On 3/26/07, Phrogz <g...@refinery.com> wrote:
>
> > On Mar 23, 12:39 pm, "Rick DeNatale" <rick.denat...@gmail.com> wrote:
> > > str.reject {|s| Regexp.new("/usr/local/lib").match(s)}
>
> > Note that the above results in Regexp#new being called for each line
> > in the string; not very efficient:
>
> Quoting my old friend Kent Beck:
>
> "Make it run before you make it fast."

On the one hand:
"Premature optimization is the root of all evil"[1]

On the other - knowing that calling a constructor on each iteration of
a block is much slower when a literal doesn't change - and when it's
less characters to type as well - might be considered not so much
premature optimization as...well...reasonable code planning.

[1] http://hans.gerwitz.com/2004/08/12/premature-optimization-is-the-root-of-all-evil.html