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Top Forums UNIX for Dummies Questions & Answers Comparison of 2 files in UNIX Post 302145178 by matrixmadhan on Tuesday 13th of November 2007 04:40:15 AM
Old 11-13-2007
try this,

Code:
perl -e ' open(FILE, "<", "f1"); while(<FILE>) { $fileHash{$_} = $. ; } close(FILE); open(FILE, "<", "f2"); while(<FILE>) { print $_ if ( $fileHash{$_} != $. ); } close(FILE); '

 

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Log::Report::Dispatcher::File(3pm)			User Contributed Perl Documentation			Log::Report::Dispatcher::File(3pm)

NAME
Log::Report::Dispatcher::File - send messages to a file or file-handle INHERITANCE
Log::Report::Dispatcher::File is a Log::Report::Dispatcher SYNOPSIS
dispatcher Log::Report::Dispatcher::File => 'stderr' , to => *STDERR, accept => 'NOTICE-'; # close a dispatcher dispatcher close => 'stderr'; # let dispatcher open and close the file dispatcher FILE => 'mylog', to => '/var/log/mylog' , charset => 'utf-8'; ... dispatcher close => 'mylog'; # will close file # open yourself, then also close yourself open OUT, ">:encoding('iso-8859-1')", '/var/log/mylog' or fault "..."; dispatcher FILE => 'mylog', to => *OUT; ... dispatcher close => 'mylog'; close OUT; # dispatch into a scalar my $output = ''; open $outfile, '>', $output; dispatcher FILE => 'into-scalar', to => $outfile; ... dispatcher close => 'into-scalar'; print $output; DESCRIPTION
This basic file logger accepts an file-handle or filename as destination. METHODS
Constructors $obj->close Only when initiated with a FILENAME, the file will be closed. In any other case, nothing will be done. Log::Report::Dispatcher::File->new(TYPE, NAME, OPTIONS) -Option --Defined in --Default accept Log::Report::Dispatcher depend on mode charset Log::Report::Dispatcher LOCALE format_reason Log::Report::Dispatcher 'LOWERCASE' locale Log::Report::Dispatcher <system locale> mode Log::Report::Dispatcher 'NORMAL' replace false to <required> accept => REASONS charset => CHARSET format_reason => 'UPPERCASE'|'LOWERCASE'|'UCFIRST'|'IGNORE'|CODE locale => LOCALE mode => 'NORMAL'|'VERBOSE'|'ASSERT'|'DEBUG'|0..3 replace => BOOLEAN Only used in combination with a FILENAME: throw away the old file if it exists. Probably you wish to append to existing information. Use the LOCALE setting by default, which is LC_CTYPE or LC_ALL or LANG (in that order). If these contain a character-set which Perl understands, then that is used, otherwise silently ignored. to => FILENAME|FILEHANDLE|OBJECT You can either specify a FILENAME, which is opened in append mode with autoflush on. Or pass any kind of FILE-HANDLE or some OBJECT which implements a "print()" method. You probably want to have autoflush enabled on your FILE-HANDLES. When cleaning-up the dispatcher, the file will only be closed in case of a FILENAME. Accessors $obj->filename Returns the name of the opened file, or "undef" in case this dispatcher was started from a file-handle or file-object. $obj->isDisabled See "Accessors" in Log::Report::Dispatcher $obj->mode See "Accessors" in Log::Report::Dispatcher $obj->name See "Accessors" in Log::Report::Dispatcher $obj->needs See "Accessors" in Log::Report::Dispatcher $obj->type See "Accessors" in Log::Report::Dispatcher Logging $obj->collectLocation Log::Report::Dispatcher::File->collectLocation See "Logging" in Log::Report::Dispatcher $obj->collectStack([MAXDEPTH]) Log::Report::Dispatcher::File->collectStack([MAXDEPTH]) See "Logging" in Log::Report::Dispatcher $obj->log(HASH-of-OPTIONS, REASON, MESSAGE) See "Logging" in Log::Report::Dispatcher $obj->stackTraceLine(OPTIONS) Log::Report::Dispatcher::File->stackTraceLine(OPTIONS) See "Logging" in Log::Report::Dispatcher $obj->translate(HASH-of-OPTIONS, REASON, MESSAGE) See "Logging" in Log::Report::Dispatcher SEE ALSO
This module is part of Log-Report distribution version 0.94, built on August 23, 2011. Website: http://perl.overmeer.net/log-report/ LICENSE
Copyrights 2007-2011 by Mark Overmeer. For other contributors see ChangeLog. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html perl v5.14.2 2011-08-23 Log::Report::Dispatcher::File(3pm)
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