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Top Forums UNIX for Dummies Questions & Answers Pattern searching inside Variable - not looking at files Post 73940 by vgersh99 on Monday 6th of June 2005 05:07:28 PM
Old 06-06-2005
no input validation - taking the set assumptions

red.sh Q0105
red.sh Q0305

red.sh:
Code:
#!/bin/ksh

typeset -Z2 year=$(echo $1 | sed 's/^.*\(..\)$/\1/')
typeset -i quat=$(echo $1 | sed 's/^Q\(..\).*$/\1/')

typeset -Z2 mon

for i in 1 2 3
do
   mon="$(( i + (quat - 1) * 3 ))"
   eval m${i}="M${mon}${year}"
done

echo "m1->[${m1}]"
echo "m2->[${m2}]"
echo "m3->[${m3}]"

which can be simplified a bit further given ksh-nature of the script - left as an exercise.
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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