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Top Forums Shell Programming and Scripting Compare two files and print the two lines with difference Post 302327489 by durden_tyler on Sunday 21st of June 2009 11:52:13 PM
Old 06-22-2009
Quote:
Originally Posted by kingpeejay
...
3. The comparison is not between line 1 of file 1 and line 1 of file 2. The comparison is between line 1 of file 1 and the line on file 2 that has the same first word as the line in file 1.
...
So what should the output be if the files have data as follows ?

Code:
$ 
$ cat file1
abc 123 def
ace 246 gik
xyz 357 vnc
pqr 789 stu
$ 
$ cat file2
jgm 342 tpm
ace 246 gik
abc 321 def
xyz 357 vnc
$ 
$

Quote:
The output file should be:
"Lines that contains mismatch"
abc 123 def
"This is the correct line"
abc 321 def
(a) What makes "abc 321 def" the correct line ?
(b) Why is "abc 123 def" not the correct line ?

tyler_durden
 

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Number::Compare(3)					User Contributed Perl Documentation					Number::Compare(3)

NAME
Number::Compare - numeric comparisons SYNOPSIS
Number::Compare->new(">1Ki")->test(1025); # is 1025 > 1024 my $c = Number::Compare->new(">1M"); $c->(1_200_000); # slightly terser invocation DESCRIPTION
Number::Compare compiles a simple comparison to an anonymous subroutine, which you can call with a value to be tested again. Now this would be very pointless, if Number::Compare didn't understand magnitudes. The target value may use magnitudes of kilobytes ("k", "ki"), megabytes ("m", "mi"), or gigabytes ("g", "gi"). Those suffixed with an "i" use the appropriate 2**n version in accordance with the IEC standard: http://physics.nist.gov/cuu/Units/binary.html METHODS
->new( $test ) Returns a new object that compares the specified test. ->test( $value ) A longhanded version of $compare->( $value ). Predates blessed subroutine reference implementation. ->parse_to_perl( $test ) Returns a perl code fragment equivalent to the test. AUTHOR
Richard Clamp <richardc@unixbeard.net> COPYRIGHT
Copyright (C) 2002,2011 Richard Clamp. All Rights Reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
http://physics.nist.gov/cuu/Units/binary.html perl v5.18.2 2011-09-21 Number::Compare(3)
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