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For 2023 - 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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

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Perl module P203
More about the Perl Environment
Exercises, examples and other material relating to training module P203. This module is presented on Private Courses and Specially Run Courses only

Want to just click on a Perl program's icon and have it run? Want to simply type in the name of a file at the command prompt and have your operating system know it's a Perl program? This module tells you how. You'll also learn how to check the syntax of your program without running it, and how to get extra warnings out in the process if your code isn't "clean".

Related technical and longer articles
Parrot - Perl's new Virtual Machine

Articles and tips on this subjectupdated
2876Different perl examples - some corners I rarely explore
The private Perl course that I ran on Wednesday through Friday of last week was a little out of the ordinary as we were concentrating far more that usual on a wide variety of practices that may be found - either in legacy code or advanced recent code. Great fun for me, and plenty of new examples. Here ...
1865Debugging and Data::Dumper in Perl
I'll admit it - I'm not a great fan of debuggers, preferring to write well structured code, and check it out with a few test / intermediate print statements. You'll often find I code:     $trace and print (something); in Perl, and this allows me to add a line     $trace=1; at ...
748Getting rid of variables after you have finished with them
If you've finished with a variable in your program, you can usually just leave it "in situe" and it will be destroyed and the memory it occupied will be released when you exit from your program. In many languages, variables within named blocks of code have an even shorter "shelf life" - by default, a ...
328Making programs easy for any user to start
If you write a program in Perl, your colleague writes a program in Tcl/Tk and your company runs an open source program that's written in Python, how do your users ensure that they get the right interpretter to run the program? You certainly don't want them to have to remember to type something like: perl ...
743How to debug a Perl program
Have you every written a Perl program that doesn't perform as you would wish? Yes, everyone who's written a Perl program has done that. Once any syntax errors have been corrected, you run your program for the first time and you check - VERY carefully - the results. Any errors, and the patterns of errors, ...
Examples from our training material
assume   Perl assumes empty variables
d2   Prompt, read, chop and echo with comments, warnings and POD documentation
rw2   read, calculate, print results (2)
rw3   Calculate, using a module
symbols.pm   Package used within simple perl example
The best way to learn is to listen and then to try
Background information
Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from [here].
Topics covered in this module
Integrating your program with your computer.
Unix and Linux systems (including Solaris and OS X).
Executable path.
File Permissions.
Telling the calling shell this is Perl.
Windows 98, 2000, NT and XP systems.
Associating your file with Perl.
Running your program.
MS-DOS users.
Classic OS 9 and earlier.
The compiler and the interpreter.
Compiled languages.
Interpreted languages.
The middle way -- Perl.
Some questions on compilers and interpreters.
Can I run just the compiler to check if I've got the syntax (language) of my program correct?.
What if I make a mistake in my program?.
Debugging tools.
Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Ruby, Lua, Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us.

We have a technical library of over 700 books on the subjects on which we teach. These books are available for reference at our training centre.

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