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Full Discussion: How to merge number?
Top Forums UNIX for Dummies Questions & Answers How to merge number? Post 302559661 by agama on Tuesday 27th of September 2011 11:00:40 PM
Old 09-28-2011
Using awk, this is one way:

Code:
awk '
    function showit()
    {
            if( first++ )
                printf( ", " );
            if( last != start )
                printf( "%d - %d", start, last );
            else
                printf( "%d", start );
    }

    BEGIN {last = - 9e9; }
    {
        if( last != $1 - 1 )
        {
            if( start )
                showit()
            start = $1;
        }

        last = $1;
    }

    END {
        showit();
        printf( "\n" );
    }
'

This works for your example, but will need to be modified if your starting value is 0. Input records are read from standard input.
Last edited by agama; 09-28-2011 at 12:05 AM.. Reason: redid print to match request
This User Gave Thanks to agama For This Post:
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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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