09-10-2009
Difference between files
I have two files like follows: -
File 1: -
A 20
B 15
D 10
C 6
File 2: -
B 21
A 20
C 11
D 10
Now I want file like this: -
It should pick up 'A' from File 1 and pick up 'A' from File 2 and should get difference of the numbers in 2nd column and display result as follows
Result: -
file1 file2 Diff
A 20 20 0
B 21 15 6
C 11 6 5
D 10 10 10
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LEARN ABOUT CENTOS
file::spec::functions
File::Spec::Functions(3) User Contributed Perl Documentation File::Spec::Functions(3)
NAME
File::Spec::Functions - portably perform operations on file names
SYNOPSIS
use File::Spec::Functions;
$x = catfile('a','b');
DESCRIPTION
This module exports convenience functions for all of the class methods provided by File::Spec.
For a reference of available functions, please consult File::Spec::Unix, which contains the entire set, and which is inherited by the
modules for other platforms. For further information, please see File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, or File::Spec::VMS.
Exports
The following functions are exported by default.
canonpath
catdir
catfile
curdir
rootdir
updir
no_upwards
file_name_is_absolute
path
The following functions are exported only by request.
devnull
tmpdir
splitpath
splitdir
catpath
abs2rel
rel2abs
case_tolerant
All the functions may be imported using the ":ALL" tag.
COPYRIGHT
Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
File::Spec, File::Spec::Unix, File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, File::Spec::VMS, ExtUtils::MakeMaker
perl v5.16.3 2013-01-16 File::Spec::Functions(3)