Perl - Miscellany

Miscellany - Perl module P303

If you're going to be using Perl in depth every day, this module covers some golden nuggets and extra syntaxes that you might have been looking for. There's a rule of thumb with Perl Ð "If you're finding something more difficult than you expected, there's probably an easier way".

This topic is presented on public course Perl for Larger Projects

Examples from our training material

asp	Command line options to add implicit read loop and split
cmc.pm	Defining a subroutine prototype
dob	uses of "do"
go1	The goto statement ... if you must ...
go2	goto based on a value - a sort of switch
go4	Goto an array of possibilities
hoco	the continue block
mudemo	running an operating system command
mudemo2	Testing to see if a variable is tainted
owncheck	Use of caller and wantarray
spt3	A subroutine prototype defined too late
spt4	A subroutine prototype defined in time
sptest1	Using a prototyped method correctly
sptest2	Using a prototyped method incorrectly
sudemo	Operation that will fail if run tainted

Opentalk forum discussions related to this topic

Overwriting files

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 http://www.training-notes.co.uk.

Topics covered in this module

Checking calling sequences.
Trust.
Checking yourself.
Subroutine prototypes.
Examples.
Where am I?.
Which file? Which line of that file?.
Goto Statements.
The unconditional goto.
The "computed" goto.
goto a subroutine.
Do and continue.
continue blocks.
do statements.
Command line options.
Tainted Perl.
How does tainting work?.
How do I tell if a scalar is tainted?.
Untainting information.
Other special variables.
Special Lists.
Special Hashes.
Special Scalars.
Special file handles.
Special subroutines.

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 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 600 books on the subjects on which we teach. These books are available for reference at our training centre. Also available is the Opentalk Forum for discussion of technical questions.