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Top Forums Shell Programming and Scripting Take out File-B contents from File-A within Vi/ViM Post 302877598 by rbatte1 on Monday 2nd of December 2013 12:57:47 PM
Old 12-02-2013
Assuming you have input like this:-
Code:
$ cat File-A
12300 Target account 1
12321 Target account 2
12344 Target account 3
12345 Account to exclude 1
22344 Target account 4
22346 Account to exclude 2
32347 Account to exclude 3
52344 Target account 5

$ cat File-B
12345
22346
32347

.... and you want the records of File-B that are not in the reference of File-A, you could simply use grep with the -vf options thus:-
Code:
grep -vf File-B File-A > File-C

You can then rename File-C to File-A. Make sure you do not try to do it all in one step like this:-
Code:
grep -vf File-B File-A > File-A

.... or you will just end up with an empty File-A


If you worry that you might exclude too many records, e.g. one that has the string 12345 in the middle somewhere, change your File-B to have a leading ^ and a trailing space (or whatever delimiter you use in File-A)


I hope that this helps, or have I missed the point completely?

Apologies if I have.


Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
 

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Plack::Session::Store::File(3pm)			User Contributed Perl Documentation			  Plack::Session::Store::File(3pm)

NAME
Plack::Session::Store::File - Basic file-based session store SYNOPSIS
use Plack::Builder; use Plack::Middleware::Session; use Plack::Session::Store::File; my $app = sub { return [ 200, [ 'Content-Type' => 'text/plain' ], [ 'Hello Foo' ] ]; }; builder { enable 'Session', store => Plack::Session::Store::File->new( dir => '/path/to/sessions' ); $app; }; # with custom serializer/deserializer builder { enable 'Session', store => Plack::Session::Store::File->new( dir => '/path/to/sessions', # YAML takes it's args the opposite order serializer => sub { YAML::DumpFile( reverse @_ ) }, deserializer => sub { YAML::LoadFile( @_ ) }, ); $app; }; DESCRIPTION
This implements a basic file based storage for session data. By default it will use Storable to serialize and deserialize the data, but this can be configured easily. This is a subclass of Plack::Session::Store and implements its full interface. METHODS
new ( %params ) The %params can include dir, serializer and deserializer options. It will check to be sure that the dir is writable for you. dir This is the directory to store the session data files in, if nothing is provided then "/tmp" is used. serializer This is a CODE reference that implements the serialization logic. The CODE ref gets two arguments, the $value, which is a HASH reference to be serialized, and the $file_path to save it to. It is not expected to return anything. deserializer This is a CODE reference that implements the deserialization logic. The CODE ref gets one argument, the $file_path to load the data from. It is expected to return a HASH reference. BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT. AUTHOR
Stevan Little <stevan.little@iinteractive.com> COPYRIGHT AND LICENSE
Copyright 2009, 2010 Infinity Interactive, Inc. <http://www.iinteractive.com> This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.4 2011-07-27 Plack::Session::Store::File(3pm)
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