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How to reform text string?

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Top Forums Shell Programming and Scripting How to reform text string?
# 8  
Old 06-27-2015
Quote:
Originally Posted by pilnet101
Looking at coming up with another solution for this in pure shell, similar to Don's solutions - I have been trying to use parameter expansion/substitution. I can only envisage that this would be achievable by doing this only if back references are supported. Looking at several sources online - ksh93 supposedly supports them, can anyone confirm this?

Something along the lines of:
Code:
tmp=${HOST_LIST// / strings=}
echo ${tmp//strings=\([![:digit:]]\)/\1"\n"}

With the above code, bash version:
Code:
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin14)

and ksh version:
Code:
Copyright (C) 2007 Free Software Foundation, Inc.
  version         sh (AT&T Research) 93u+ 2012-08-01

produce the output:
Code:
t70c7n133 strings=16 strings=t70c7n134 strings=16 strings=t70c7n135 strings=16 strings=t70c7n136 strings=16 strings=t70c7n137 strings=16 strings=t70c7n138 strings=16 strings=t70c7n140 strings=16 strings=t70c7n141 strings=16

This User Gave Thanks to Don Cragun For This Post:
pilnet101
# 9  
Old 06-27-2015
sed solution based on you own approach, leaving out fold:
Code:
echo $HOST_LIST | sed -r 's/ ([0-9]+)( |$)/ slots=\1\n/g;s/\n$//'

This User Gave Thanks to RudiC For This Post:
crimso
# 10  
Old 06-27-2015
Code:
$ printf "%s slots=%s\n" $HOST_LIST
t70c7n133 slots=16
t70c7n134 slots=16
t70c7n135 slots=16
t70c7n136 slots=16
t70c7n137 slots=16
t70c7n138 slots=16
t70c7n140 slots=16
t70c7n141 slots=16

These 5 Users Gave Thanks to Aia For This Post:
crimso MadeInGermany pilnet101 Scrutinizer wisecracker
# 11  
Old 06-27-2015
Longhand using OSX 10.7.5, default terminal using sh...
Code:
#!/bin/sh
# reformat
HOST_LIST='t70c7n133 16 t70c7n134 16 t70c7n135 16 t70c7n136 16 t70c7n137 16 t70c7n138 16 t70c7n140 16 t70c7n141 16'
# Working section.
HOST_LIST=( $HOST_LIST )
for (( n=0; n < ${#HOST_LIST[@]}; n+=2 ))
do
	echo "${HOST_LIST[$n]} slots=${HOST_LIST[$((n+1))]}"
done > /tmp/text
# End of working section.
HOST_LIST=$( cat /tmp/text )
echo "$HOST_LIST"

Results:-
Code:
Last login: Sat Jun 27 08:18:39 on ttys000
AMIGA:barrywalker~> cd Desktop/Code/Shell
AMIGA:barrywalker~/Desktop/Code/Shell> ./reformat
t70c7n133 slots=16
t70c7n134 slots=16
t70c7n135 slots=16
t70c7n136 slots=16
t70c7n137 slots=16
t70c7n138 slots=16
t70c7n140 slots=16
t70c7n141 slots=16
AMIGA:barrywalker~/Desktop/Code/Shell> _

# 12  
Old 06-29-2015
Thank-you all for the variety of solutions.
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