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Top Forums Shell Programming and Scripting Convert list of numbers to text range Post 302987702 by chrissycc on Wednesday 14th of December 2016 12:32:48 PM
Old 12-14-2016
Ok, apologies....

Not homework/assignment, just a task I want to complete at work to make reporting on some Slurm scheduler output a bit more manageable.

CentOS 7, awk the tool of choice.

I have tried the following, which seems to be getting somewhere, just having a mental block on how to get over the finishing line:

Code:
cat test | sed 's/cn//g' | \
awk '{ \
if (length(PRE) == 0)  printf "%s", $1 ; \
else if ($1>PRE+1) printf ",%s", $1 ; \
else if ($1=PRE+1) printf "-" ; \
PRE=$1 ; } \
END { print }'

Producing:

Code:
001,004,016-----,031-,038,042---,048048

(I put an additional cn048 at the end, just as a test as I got some weird output of another test batch of data using this technique. Otherwise it is the data above).

Cheers,

Chris
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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