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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

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Help convert from c shell to perl

Posted by kobie (kobie), 25 September 2007
Hi All,
I need help to convert a c shell script to perl.
Thanks for everyone.

#******** START SCRIPT *************
#!/bin/csh -cvx

source $1

echo "--0--"
echo $lnPARAM[0]
echo $lnVAL[0]
echo "--1--"
echo $lnPARAM[1]
echo $lnVAL[1]
echo "--2--"
echo $lnPARAM[2]
echo $lnVAL[2]
echo "--3--"
echo $lnPARAM[3]
echo $lnVAL[3]
echo "--4--"
echo $lnPARAM[4]
echo $lnVAL[4]
echo "--5--"
echo $lnPARAM[5]
echo $lnVAL[5]

#******** ENND SCRIPT *************

Posted by admin (Graham Ellis), 25 September 2007
Hi, Kobie .... your echos become prints and you add a semicolon on the end of each line.  The exit is unnecessary (in either language) and your source will probably become a require.

I have a saying "If you find yourself repeating something, there's probably an easier way" and I really the original script is rather nasty ... you didn't need all those echos!  What you create by doing a direct translation will be a rather nasty Perl script, and I would suggest you learn some Perl and rewrite it to a higher quality.  

Posted by kobie (kobie), 25 September 2007
Hi Graham Ellis,
Thank you for your quick answer  ,
My big problem is the line: source $1
What is the purpose of this line? and what should i use instead of it in perl?
Thanks again

Posted by admin (Graham Ellis), 25 September 2007
source $1

means "run the file named on the command line in the current script at this point".    The equivalent in perl would be:

require $ARGV[0];

and you'll need to rewrite the sourced / required file into Perl too.

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