From: Robert Klemme <shortcutter@...>
Date: 2013-03-05T21:08:24+09:00
Subject: Re: YourLanguageSucks

On Tue, Mar 5, 2013 at 8:57 AM, Bartosz Dziewoński <matma.rex@gmail.com> wrote:
>
> On Tue, 05 Mar 2013 07:12:05 +0100, Josh Cheek <josh.cheek@gmail.com>
> wrote:
>
>>> Regular expressions are always in multi-line mode
>>>  >> ?
>>
>> Was this ever true? It hasn't been since I've been using Ruby (about 5
>> years), unless I was just too noob when I started to realize it.
>
>
> Yes, and still is. "multi-line mode" means that ^ matches the beginning of
> a line, and $ the end of a line, instead of beginning/end of a string (Ruby
> uses \A and \Z / \z for this).

Note that Ruby's "multi line" mode is about matching of "." and not
about anchoring of ^ and $.  I'm not even sure there is a general
definition of "multi line mode" for regular expressions across
language.

> "a\nb\nc"[­/^.*$/]
=> "a"
> "a\nb\nc"[­/^.*$/m]
=> "a
b
c"

Cheers

robert


--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/