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Read column and find differences...

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# 8  
Old 10-30-2012
Quote:
Originally Posted by empyrean
@agama : Thankyou .. the code works great but only thing is that its not printing in ascending order.

wanted to understand the code..
Pipe it through sort.

Code:
awk '
    { a[$1+0] = $0; }
    END {
        for( x in a )
        {
            printf( "%s", a[x] );
            sc = " ";
            for( i = x-10; i <= x + 10; i++ )
                if( i != x  &&  i in a )
                {
                    printf( "%s%d", sc, i );
                    sc = ", ";
                }
            printf( "\n" );
        }
    }
' infile | sort
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poe::pipe::oneway

POE::Pipe::OneWay(3pm)					User Contributed Perl Documentation				    POE::Pipe::OneWay(3pm)

NAME

       POE::Pipe::OneWay - a portable API for one-way pipes

SYNOPSIS

	 my ($read, $write) = POE::Pipe::OneWay->new();
	 die "couldn't create a pipe: $!" unless defined $read;

DESCRIPTION

       The right way to create an anonymous pipe varies from one operating system to the next.	Some operating systems support "pipe()".  Others
       require "socketpair()".	And a few operating systems support neither, so a plain old socket must be created.

       POE::Pipe::OneWay will attempt to create a unidirectional pipe using "pipe()", "socketpair()", and IO::Socket::INET, in that order.
       Exceptions are hardcoded for operating systems with broken or nonstandard behaviors.

       The upshot of all this is that an application can portably create a one-way pipe by instantiating POE::Pipe::OneWay.  The work of deciding
       how to create the pipe and opening the handles will be taken care of internally.

       POE::Pipe::OneWay may be used outside of POE, as it doesn't use POE internally.

PUBLIC METHODS

   new [TYPE]
       Create a new one-way pipe, optionally constraining it to a particular TYPE of pipe.  One-way pipes have two ends: a "read" end and a
       "write" end.  On success, new() returns two handles: one for the "read" end and one for the "write" end.  Returns nothing on failure, and
       sets $!	to explain why the constructor failed.

	 my ($read, $write) = POE::Pipe::OneWay->new();
	 die $! unless defined $read;

       TYPE may be one of "pipe", "socketpair", or "inet".  When set, POE::Pipe::OneWay will constrain its search to either "pipe()", a UNIX-
       domain "socketpair()", or plain old sockets, respectively.  Otherwise new() will try each method in order, or a particular method
       predetermined to be the best one for the current operating environment.

BUGS

       POE::Pipe::OneWay may block up to one second on some systems if failure occurs while trying to create "inet" sockets.

SEE ALSO

       POE::Pipe, POE::Pipe::TwoWay.

AUTHOR &; COPYRIGHT
       POE::Pipe::OneWay is copyright 2000-2008 by Rocco Caputo.  All rights reserved.	POE::Pipe::OneWay is free software; you may redistribute
       it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-05-15						    POE::Pipe::OneWay(3pm)