From: Robert Klemme <shortcutter@...>
Date: 2009-12-18T23:39:40+09:00
Subject: Re: grep a block

2009/12/18 beny 18241 <beny18241@gmail.com>:
> ok closed Ifigue it out :)
>
> puts ARGF.read.scan(/<mms:MmsCcppAccept>.*?<\/mms:MmsCcppAccept>/m)

Eric's solution is better for large files because it requires reading
the file line by line only.  Note that it uses a special feature of
"if" when using a range with boolean expressions: in that case
matching state is stored and the complete expression is true when the
first matches, stays true and only switches back to false if the
second matches:

irb(main):001:0> 10.times {|i| if /^3/ =~ i.to_s .. /^7/ =~ i.to_s; puts i; end}
3
4
5
6
7
=> 10

irb(main):002:0> 10.times {|i| if i == 3 .. i == 7; puts i; end}
3
4
5
6
7
=> 10

Note: the second example is merely for demonstration purposes, it can
also be done with a single integer range match:

irb(main):003:0> 10.times {|i| if (3..7) === i; puts i; end}
3
4
5
6
7
=> 10

Kind regards

robert

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