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Full Discussion: Delete duplicate lines... with a twist!
Top Forums Shell Programming and Scripting Delete duplicate lines... with a twist! Post 302575999 by durden_tyler on Wednesday 23rd of November 2011 11:02:14 AM
Old 11-23-2011
Code:
$
$ cat f42
"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
the quick brown 123 fox jumps over the lazy ?@! dog
the 456 quick brown fox jumps over the ~*%# lazy dog
123 the quick brown @%#$!^ fox jumps over the lazy ~()& dog
$
$
$
$ perl -lne '$h=$_; s/[^\w]|_//g; tr/A-Z/a-z/; s/(.)(?=.*?\1)//g;
             $_=join "",sort split "";
             print $h if not defined $x{$_}; $x{$_}++
            ' f42
"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
the quick brown 123 fox jumps over the lazy ?@! dog
the 456 quick brown fox jumps over the ~*%# lazy dog
$
$
$

tyler_durden
This User Gave Thanks to durden_tyler For This Post:
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LEARN ABOUT REDHAT

uniq

UNIQ(1) 								FSF								   UNIQ(1)

NAME

       uniq - remove duplicate lines from a sorted file

SYNOPSIS

       uniq [OPTION]... [INPUT [OUTPUT]]

DESCRIPTION

       Discard all but one of successive identical lines from INPUT (or standard input), writing to OUTPUT (or standard output).

       Mandatory arguments to long options are mandatory for short options too.

       -c, --count
	      prefix lines by the number of occurrences

       -d, --repeated
	      only print duplicate lines

       -D, --all-repeated[=delimit-method] print all duplicate lines
	      delimit-method={none(default),prepend,separate} Delimiting is done with blank lines.

       -f, --skip-fields=N
	      avoid comparing the first N fields

       -i, --ignore-case
	      ignore differences in case when comparing

       -s, --skip-chars=N
	      avoid comparing the first N characters

       -u, --unique
	      only print unique lines

       -w, --check-chars=N
	      compare no more than N characters in lines

       --help display this help and exit

       --version
	      output version information and exit

       A field is a run of whitespace, then non-whitespace characters.	Fields are skipped before chars.

AUTHOR

       Written by Richard Stallman and David MacKenzie.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The full documentation for uniq is maintained as a Texinfo manual.  If the info and uniq programs are properly installed at your site,  the
       command

	      info uniq

       should give you access to the complete manual.

uniq (coreutils) 4.5.3						   February 2003							   UNIQ(1)
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