From: Robert Dober <robert.dober@...>
Date: 2009-04-08T22:29:51+09:00
Subject: Re: Concatenating Regex Smartly

On Wed, Apr 8, 2009 at 12:00 PM, Robert Klemme
<shortcutter@googlemail.com> wrote:
> On 08.04.2009 11:47, Shak Shak wrote:
>>
>> Is there a way of quickly concatenating two full string patterns in a
>> way that takes into account the boundaries? So for example:
>>
>> \A\d+\Z  and \A[a-z]+\Z
Not that I am aware of, their semantics however is slightly different:

irb(main):001:0> "abc\n" =~ /.\Z/ # \Z matches the \n
=> 2
irb(main):002:0> "abc\n" =~ /.\z/ # \z does not match the \n and neither does .
=> nil
irb(main):003:0> "abc\n" =~ /.\z/m # Now, in multiline mode, the .
matches the \n
=> 3

Now this is for 1.9 maybe this does not hold for 1.8.
Cheers
R.

-- 
 If you want to build a ship, don’t herd people together to collect
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