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Re: Script to parse a text file and extract unique email addresses

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nomdeplume82008@googlemail.com wrote on 21. August 2014:
>
> On Wednesday, August 20, 2014 10:26:18 PM UTC, Andreas Kohlbach wrote:
>> wrote on 20. August 2014:
>> 
>> > It would be best to get the script to extract characters around a @ sign. All of them appear to be enclosed in a <> symbols.
>> 
>> Try
>> 
>> grep -E -o "\b[a-zA-Z0-9.-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9.-]+\b"|sed -e 's/^//'
>> 
>> to extract from the file.
>
> Wow thanks, that was amazing. 
>
> Do you have a moment to explain how it works?

You feed the Linux (Unix has it too) grep command with the expression
following. Then pipe it through sed, which might not actually be
necessary.

The \b is "the edge of a word". The rest character ranges between "@" and ".".

Anyone can recommend him a good web page for beginners?
-- 
Andreas

I wish my grass was emo. Then it would cut itself.

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Script to parse a text file and extract unique email addresses nomdeplume82008@googlemail.com - 2014-08-19 10:19 -0700
  Re: Script to parse a text file and extract unique email addresses Andreas Kohlbach <aug14.8.ankman@spamgourmet.com> - 2014-08-19 16:40 -0400
    Re: Script to parse a text file and extract unique email addresses The Natural Philosopher <tnp@invalid.invalid> - 2014-08-20 14:21 +0100
      Re: Script to parse a text file and extract unique email addresses nomdeplume82008@googlemail.com - 2014-08-20 08:52 -0700
        Re: Script to parse a text file and extract unique email addresses Andreas Kohlbach <aug14.8.ankman@spamgourmet.com> - 2014-08-20 18:26 -0400
          Re: Script to parse a text file and extract unique email addresses nomdeplume82008@googlemail.com - 2014-08-20 21:10 -0700
            Re: Script to parse a text file and extract unique email addresses Andreas Kohlbach <aug14.8.ankman@spamgourmet.com> - 2014-08-21 18:07 -0400
          Re: Script to parse a text file and extract unique email addresses Tim Watts <tw_usenet@dionic.net> - 2014-08-21 10:53 +0100
            Re: Script to parse a text file and extract unique email addresses Andreas Kohlbach <aug14.8.ankman@spamgourmet.com> - 2014-08-21 18:03 -0400
        Re: Script to parse a text file and extract unique email addresses Bill Marcum <bill.marcum57@yahoo.com> - 2014-08-21 03:34 -0400
          Re: Script to parse a text file and extract unique email addresses The Natural Philosopher <tnp@invalid.invalid> - 2014-08-21 12:12 +0100
          Re: Script to parse a text file and extract unique email addresses Chris Davies <chris-usenet@roaima.co.uk> - 2014-08-21 12:12 +0100
            Re: Script to parse a text file and extract unique email addresses The Natural Philosopher <tnp@invalid.invalid> - 2014-08-21 14:22 +0100
              Write it in C... (Was: Script to parse a text file and extract unique email addresses) gazelle@shell.xmission.com (Kenny McCormack) - 2014-08-21 13:42 +0000
                Re: Write it in C... (Was: Script to parse a text file and extract unique email addresses) The Natural Philosopher <tnp@invalid.invalid> - 2014-08-21 15:23 +0100
                Re: Write it in C... Rich <rich@example.invalid> - 2014-08-21 16:17 +0000
                Re: Write it in C... The Natural Philosopher <tnp@invalid.invalid> - 2014-08-21 18:42 +0100
                Re: Write it in C... William Unruh <unruh@invalid.ca> - 2014-08-21 18:38 +0000
        Re: Script to parse a text file and extract unique email addresses Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> - 2014-09-24 13:18 +0000
          Re: Script to parse a text file and extract unique email addresses Doug Laidlaw <laidlaws@hotkey.net.au> - 2014-09-25 01:49 +1000
            Re: Script to parse a text file and extract unique email addresses Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> - 2014-09-25 09:34 +0000
  Re: Script to parse a text file and extract unique email addresses Mladen Gogala <gogala.mladen@gmail.com> - 2014-09-29 00:17 +0000
    Re: Script to parse a text file and extract unique email addresses Rich <rich@example.invalid> - 2014-09-29 00:52 +0000
      Re: Script to parse a text file and extract unique email addresses gazelle@shell.xmission.com (Kenny McCormack) - 2014-09-29 01:13 +0000
    Re: Script to parse a text file and extract unique email addresses Tim Watts <tw_usenet@dionic.net> - 2014-09-29 07:40 +0100
    Re: Script to parse a text file and extract unique email addresses Eric Pozharski <whynot@pozharski.name> - 2014-09-29 09:52 +0300

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