Exercises, examples and other material relating to training module P258. This module is presented on Private Courses
and Specially Run Courses
|Articles and tips on this subject||updated|
|2834||Teaching examples in Perl - third and final part|
Three part article ... this is part 3. Jump back to part  
Following on from two earlier posts, here is the final third of the new examples that I wrote during last week's Perl course, and to which I have added extra documentation over the last couple of days.
P212 More on Character Strings
|2022||Pre and post increment - the ++ operator|
The ++ (increment) operator in PHP (and Perl, and C, and Ruby) adds one to the value held in a variable and saves the result back in the same variable. But you'll see both $n++; and ++$n; in code. What is the difference?
If you write the ++ in front of the variable name, the variable is incremented ...
|1702||Running operating system commands in Perl|
Perl is excellent "glueware" - a language which can be well used to connect together a whole lot of elements. And one of those elements may be operating system commands run from within the Perl program.
Here are (three!) ways that you can do it - in each case leaving the result of running the commands ...
|1633||Changing a screen saver from a web page (PHP, Perl, OSX)|
Here's a challenge. I want to change the screen saver on a mac mini, running OSX, from a browser anywhere in the world.
You may well ask why ... the screen of the mac mini is to be visible at Well House Manor where it will provide an information screen at the front door when it's not otherwise in ...
Examples from our training material
PicturesPerl class, Saudi Arabia
Some modules are available for download
as a sample of our material or under an Open Training Notes License
for free download from http://www.training-notes.co.uk
Topics covered in this module
Sourcing and Installation.
Installing Perl modules from the CPAN.
Operating System command access.
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