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Full Discussion: Unexpected Behaviour from grepping Text File
Top Forums UNIX for Dummies Questions & Answers Unexpected Behaviour from grepping Text File Post 302650419 by hexram on Saturday 2nd of June 2012 10:44:01 PM
Old 06-02-2012
Maybe this can help:
Code:
egrep ^...a.....n. /usr/share/dict/2of12.txt | head -5
advancement
apparition
arraignment
arrangement
audaciousness

I think that a period matches any character, including the record separator, in a regular expression.

---------- Post updated at 10:44 PM ---------- Previous update was at 10:28 PM ----------

Maybe THIS can help better:
Code:
egrep -w ...a.....n. /usr/share/dict/2of12.txt | head -5
advancement
apparition
arraignment
arrangement
bipartisan

The -w option stands for --word-regexp in egrep's man. Still, a period may match a record separator and thus you get ten character words OR eleven character words...

Now THIS may be quite what you wanted in the first place:
Code:
egrep -w '...a.....n[^^M]' /usr/share/dict/2of12.txt | head -5
advancement
arraignment
arrangement
derangement
devastating

The regular expression ends with a character range that means 'any character EXCEPT a record separator'; you may get it as a caret followed by a newline, both enclosed in brackets (open bracket, caret, control-V, newline, close bracket). Just a single tiny side-effect: I get 'self-advancement' somewhere down the list of results...
Last edited by hexram; 06-02-2012 at 11:58 PM.. Reason: Further clarification of my answer
This User Gave Thanks to hexram For This Post:
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LEARN ABOUT DEBIAN

pod::wordlist

Wordlist(3pm)						User Contributed Perl Documentation					     Wordlist(3pm)

NAME

       Pod::Wordlist -- English words that come up in Perl documentation

SYNOPSIS

	 None!	Take that!

ABOUT

       Pod::Wordlist is used by Pod::Spell, providing a set of words (as keys in the hash %Pod::Spell::Wordlist) that are English jargon words
       that come up in Perl documentation, but which are not to be found in general English lexicons.  (For example: autovivify, backreference,
       chroot, stringify, wantarray.)

       You can also use this wordlist with your word processor by just pasting "Pod/Wordlist.pm"'s content into your wordprocessor, deleting the
       leading Perl code so that only the wordlist remains, and then spellchecking this resulting list and adding every word in it to your private
       lexicon.

CONTRIBUTING

       You are welcome to send me your wordlists too, for possible incorporation into this wordlist.  I can take them only in ASCII.

       Note that the scope of this file is only English, specifically American English.  (But you may find in useful to incorporate into your own
       lexicons, even if they are for other dialects/languages.)

COPYRIGHT AND DISCLAIMER

       Copyright (c) 2001 Sean M. Burke.  All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       This library is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of mer-
       chantability or fitness for a particular purpose.

AUTHOR

       Sean M. Burke, sburke@cpan.org

       [NB: This wordlist includes much of a wordlist that Mark-Jason Dominus gave me.]

perl v5.8.8							    2001-10-27							     Wordlist(3pm)
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