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Top Forums Shell Programming and Scripting Delete duplicate lines... with a twist! Post 302575709 by shadowww on Tuesday 22nd of November 2011 02:29:51 PM
Old 11-22-2011
Java Delete duplicate lines... with a twist!

Hi, I'm sorry I'm no coder so I came here, counting on your free time and good will to beg for spoonfeeding some good code. I'll try to be quick and concise!

Got file with 50k lines like this:
Code:
"Heh, heh. Those darn ninjas. They're _____."*wacky
The "canebrake", "timber" & "pygmy" are types of what?*rattlesnakes
Science : The second space shuttle was named ------*challenger

Problem is that somewhere (anywhere) in file may appear a similar line (but usually not exactly the same), which needs to be recognized as duplicate and deleted!

My example - of what could be found and should be recognized (and deleted) as duplicate:
Code:
the 'canebrake', 'timber' & 'pygmy' are types of what*rattleSNAKES
SCIENCE::: the;second;space;shuttle;was;named ??????*challenger

So I guess algorithm should basically do this:

1. from each line read only letters [a-z], [A-Z] and numbers [0-9] and disregard any possible spacing or special characters or punctuation

2. compare with every other line (in same manner a-Z, 0-9) and if same arrangement of letters and numbers is found (ignoring spacing, case, special chars...) delete one of the lines (doesn't matter which one)


Scripting language doesn't matter... perl, python, ruby, vi, awk, sed... anything goes =) (using archlinux box)

Much appreaciated!
 

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Locale::Language(3perl) 				 Perl Programmers Reference Guide				   Locale::Language(3perl)

NAME
Locale::Language - standard codes for language identification SYNOPSIS
use Locale::Language; $lang = code2language('en'); # $lang gets 'English' $code = language2code('French'); # $code gets 'fr' @codes = all_language_codes(); @names = all_language_names(); DESCRIPTION
The "Locale::Language" module provides access to standard codes used for identifying languages, such as those as defined in ISO 639. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639 two- letter codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying languages. The ones currently supported are: alpha-2 This is the set of two-letter (lowercase) codes from ISO 639, such as 'he' for Hebrew. This code set is identified with the symbol "LOCALE_LANG_ALPHA_2". This is the default code set. alpha-3 This is the set of three-letter (lowercase) bibliographic codes from ISO 639, such as 'heb' for Hebrew. This code set is identified with the symbol "LOCALE_LANG_ALPHA_3". term This is the set of three-letter (lowercase) terminologic codes from ISO 639. This code set is identified with the symbol "LOCALE_LANG_TERM". ROUTINES
code2language ( CODE [,CODESET] ) language2code ( NAME [,CODESET] ) language_code2code ( CODE ,CODESET ,CODESET2 ) all_language_codes ( [CODESET] ) all_language_names ( [CODESET] ) Locale::Language::rename_language ( CODE ,NEW_NAME [,CODESET] ) Locale::Language::add_language ( CODE ,NAME [,CODESET] ) Locale::Language::delete_language ( CODE [,CODESET] ) Locale::Language::add_language_alias ( NAME ,NEW_NAME ) Locale::Language::delete_language_alias ( NAME ) Locale::Language::rename_language_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Language::add_language_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Language::delete_language_code_alias ( CODE [,CODESET] ) These routines are all documented in the Locale::Codes man page. SEE ALSO
Locale::Codes Locale::Constants http://www.loc.gov/standards/iso639-2/ Source of the ISO 639 codes. AUTHOR
See Locale::Codes for full author history. Currently maintained by Sullivan Beck (sbeck@cpan.org). COPYRIGHT
Copyright (c) 1997-2001 Canon Research Centre Europe (CRE). Copyright (c) 2001-2010 Neil Bowers Copyright (c) 2010-2011 Sullivan Beck This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2011-09-26 Locale::Language(3perl)
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