From: Robert Klemme <shortcutter@...>
Date: 2013-05-27T02:18:07+09:00
Subject: Re: Regular expression to find a break in a pattern

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On Fri, May 24, 2013 at 12:43 PM, Joel Pearson <lists@ruby-forum.com> wrote:

> Excellent! I tried negatives using (?!\1) before but I couldn't get them
> to work. Thanks for the help.
>

You can even get the whole line content if you like

irb(main):053:0> s.scan %r{(To:\s+("\d+")\s*$\s*From:\s+(?!\2).*?(?=To))}m
=> [["To: \"1313133\"\nFrom: \"1313132\"\nrandom data lines\n\n",
"\"1313133\""]]
irb(main):054:0>
s.scan(%r{(To:\s+("\d+")\s*$\s*From:\s+(?!\2).*?(?=To))}m).map(&:first)
=> ["To: \"1313133\"\nFrom: \"1313132\"\nrandom data lines\n\n"]
irb(main):055:0> puts
s.scan(%r{(To:\s+("\d+")\s*$\s*From:\s+(?!\2).*?(?=To))}m).map(&:first)
To: "1313133"
From: "1313132"
random data lines

Or with a block:

irb(main):057:0> s.scan %r{(To:\s+("\d+")\s*$\s*From:\s+(?!\2).*?(?=To))}m
do puts $1 end;nil
To: "1313133"
From: "1313132"
random data lines

Kind regards

robert


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

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Fri, May 24, 2013 at 12:43 PM, Joel Pearson <span dir=3D"ltr">&l=
t;<a href=3D"mailto:lists@ruby-forum.com" target=3D"_blank">lists@ruby-foru=
m.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex">Excellent! I tried negatives using (?!\1) before but I cou=
ldn&#39;t get them<br>

to work. Thanks for the help.<br></blockquote><div><br></div><div style>You=
 can even get the whole line content if you like</div><div style><br></div>=
<div>irb(main):053:0&gt; s.scan %r{(To:\s+(&quot;\d+&quot;)\s*$\s*From:\s+(=
?!\2).*?(?=3DTo))}m</div>
<div>=3D&gt; [[&quot;To: \&quot;1313133\&quot;\nFrom: \&quot;1313132\&quot;=
\nrandom data lines\n\n&quot;, &quot;\&quot;1313133\&quot;&quot;]]</div><di=
v>irb(main):054:0&gt; s.scan(%r{(To:\s+(&quot;\d+&quot;)\s*$\s*From:\s+(?!\=
2).*?(?=3DTo))}m).map(&amp;:first)</div>
<div>=3D&gt; [&quot;To: \&quot;1313133\&quot;\nFrom: \&quot;1313132\&quot;\=
nrandom data lines\n\n&quot;]</div><div>irb(main):055:0&gt; puts s.scan(%r{=
(To:\s+(&quot;\d+&quot;)\s*$\s*From:\s+(?!\2).*?(?=3DTo))}m).map(&amp;:firs=
t)</div>
<div>To: &quot;1313133&quot;</div><div>From: &quot;1313132&quot;</div><div>=
random data lines</div><div><br></div><div style>Or with a block:</div><div=
 style><br></div><div style><div>irb(main):057:0&gt; s.scan %r{(To:\s+(&quo=
t;\d+&quot;)\s*$\s*From:\s+(?!\2).*?(?=3DTo))}m do puts $1 end;nil</div>
<div>To: &quot;1313133&quot;</div><div>From: &quot;1313132&quot;</div><div>=
random data lines</div><div><br></div><div style>Kind regards</div><div sty=
le><br></div><div style>robert</div></div></div><br clear=3D"all"><div><br>
</div>-- <br>remember.guy do |as, often| as.you_can - without end<br><a hre=
f=3D"http://blog.rubybestpractices.com/">http://blog.rubybestpractices.com/=
</a>
</div></div>

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