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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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

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))
Object Orientation in an hour and other Perl Lectures

I enjoy the occasional course that's different in its design and specification, and yesterday was one of those - more lectures that training, on intermediate and advanced Perl, for a group of eight delegates who were all well experienced at PHP, but Perl "dabblers" to this point. During the day, we took a number of topics, looked at each, I wrote some examples to explain the principles and my delegates then wrote some code too. Here - for them - is links to the code:

Variables

henry - shows the variable types in Perl - examples with $ @ % & and * - not to forget file handles that don't have an ordical character at the front.

References and Scope

refs - Base use of \ and $ in front of variables to create and use references
ref2 - the power of references in association with "my" and scoping controls
show_acc - a practical example that converts a file into a referenced structure for powerful extraction and reporting

Strings and Regular Expressions

cstr - writing stings with quotes, with your choice of single character delimiter, and your choice of multicharacter delimiter
reg - building up from a straightforward regular expression and making use of many facilities provided
emre - answer / discussion after exercise - keeping it simple at each step, and sparse v greedy

Object Orientation and how it works in Perl

tiny - a framework for the principles
small - first true Object Oriented example in Perl, with blessed references
medium - adding in inheritance where classes are based on each other rather than written from scratch
big - an example that uses the autoloader to provide the ability to handle lots of attributes (properties) without having to write lots of repeating code

Coercion and other miscellanies

codemo - how perl silently converts between data types
fd - where does a variable name end?
shh - reading from a file named on the command line
shhh - using topicalisation and "awk mode" too - run program on each line from a file.

Our public Perl courses are listed [here] .. and I can run any of those, and course to special agendas too, at our training centre or at your office. And I'm very happy to do lectures too - provided that you realise that you're not going to get as much from a day's lectures as you will from a week's course. But - yes - yesterday was judged a great success. Everyone went away with very specific issues clarified. Everyone got a "new dawn" look at some key features. And everyone enjoyed it too!
(written 2010-11-18, updated 2010-12-04)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
P301 - Variables in Perl
  [975] Answering ALL the delegate's Perl questions - (2006-12-09)
  [1581] What is an lvalue? (Perl, C) - (2008-03-18)
  [1946] Variable Types in Perl - (2008-12-15)
  [2241] Perl references - $$var and \$var notations - (2009-06-15)
  [2374] Lead characters on Perl variable names - (2009-08-24)
  [2877] Further more advanced Perl examples - (2010-07-19)
  [2972] Some more advanced Perl examples from a recent course - (2010-09-27)
  [3430] Sigils - the characters on the start of variable names in Perl, Ruby and Fortran - (2011-09-10)
  [4398] Accessing variables across subroutine boundaries - Perl, Python, Java and Tcl - (2015-01-18)
  [4608] Introspecion in Perl 6 - (2016-01-02)

P213 - Perl - Creating your own Classes
  [227] Bellringing and Programming and Objects and Perl - (2005-02-25)
  [246] When to bless a Perl variable - (2005-03-15)
  [983] Blessing in Perl / Member variable in Ruby - (2006-12-14)
  [1320] Perl for Larger Projects - Object Oriented Perl - (2007-08-25)
  [1435] Object Oriented Programming in Perl - Course - (2007-11-18)
  [1664] Example of OO in Perl - (2008-06-03)
  [1864] Object Oriented Perl - First Steps - (2008-11-01)
  [1925] Introduction to Object Oriented Programming - (2008-12-06)
  [2169] When should I use OO techniques? - (2009-05-11)
  [2834] Teaching examples in Perl - third and final part - (2010-06-27)
  [2969] What does blessing a variable in Perl mean? - (2010-09-24)
  [3098] Learning Object Orientation in Perl through bananas and perhaps Moose - (2010-12-21)
  [3833] Learning to use existing classes in Perl - (2012-08-10)
  [4607] Classes and object - first steps in Perl 6 - (2016-01-02)

P212 - Perl - More on Character Strings
  [453] Commenting Perl regular expressions - (2005-09-30)
  [583] Remember to process blank lines - (2006-01-31)
  [586] Perl Regular Expressions - finding the position and length of the match - (2006-02-02)
  [597] Storing a regular expression in a perl variable - (2006-02-09)
  [608] Don't expose your regular expressions - (2006-02-15)
  [737] Coloured text in a terminal from Perl - (2006-05-29)
  [928] C++ and Perl - why did they do it THAT way? - (2006-11-16)
  [943] Matching within multiline strings, and ignoring case in regular expressions - (2006-11-25)
  [1222] Perl, the substitute operator s - (2007-06-08)
  [1230] Commenting a Perl Regular Expression - (2007-06-12)
  [1251] Substitute operator / modifiers in Perl - (2007-06-28)
  [1305] Regular expressions made easy - building from components - (2007-08-16)
  [1336] Ignore case in Regular Expression - (2007-09-08)
  [1510] Handling Binary data (.gif file example) in Perl - (2008-01-17)
  [1727] Equality and looks like tests - Perl - (2008-07-29)
  [1735] Finding words and work boundaries (MySQL, Perl, PHP) - (2008-08-03)
  [1947] Perl substitute - the e modifier - (2008-12-16)
  [2230] Running a piece of code is like drinking a pint of beer - (2009-06-11)
  [2379] Making variables persistant, pretending a database is a variable and other Perl tricks - (2009-08-27)
  [2657] Want to do a big batch edit? Nothing beats Perl! - (2010-03-01)
  [2801] Binary data handling with unpack in Perl - (2010-06-10)
  [2874] Unpacking a Perl string into a list - (2010-07-16)
  [2993] Arrays v Lists - what is the difference, why use one or the other - (2010-10-10)
  [3100] Looking ahead and behind in Regular Expressions - double matching - (2010-12-23)
  [3322] How much has Perl (and other languages) changed? - (2011-06-10)
  [3332] DNA to Amino Acid - a sample Perl script - (2011-06-24)
  [3411] Single and double quotes strings in Perl - what is the difference? - (2011-08-30)
  [3546] The difference between dot (a.k.a. full stop, period) and comma in Perl - (2011-12-09)
  [3630] Serialsing and unserialising data for storage and transfer in Perl - (2012-02-28)
  [3650] Possessive Regular Expression Matching - Perl, Objective C and some other languages - (2012-03-12)
  [3707] Converting codons via Amino Acids to Proteins in Perl - (2012-04-25)
  [3927] First match or all matches? Perl Regular Expressions - (2012-11-19)
  [4452] Binary data handling - Python and Perl - (2015-03-09)

P202 - Perl Fundamentals
  [184] MTBF of coffee machines - (2005-01-20)
  [748] Getting rid of variables after you have finished with them - (2006-06-06)
  [1312] Some one line Perl tips and techniques - (2007-08-21)
  [1448] Question on division (Java) - Also Perl, PHP, Python ... - (2007-11-28)
  [1726] Hot Courses - Perl - (2008-07-28)
  [1826] Perl - Subs, Chop v Chomp, => v , - (2008-10-08)
  [2442] Variable storage - Perl, Tcl and Python compared - (2009-10-08)
  [2832] Are you learning Perl? Some more examples for you! - (2010-06-27)
  [2876] Different perl examples - some corners I rarely explore - (2010-07-18)
  [3102] AND and OR operators - what is the difference between logical and bitwise varieties? - (2010-12-24)
  [3278] Do I need to initialise variables - programming in C, C++, Perl, PHP, Python, Ruby or Java. - (2011-05-05)
  [3329] Perl from basics - (2011-06-20)
  [3398] Perl - making best use of the flexibility, but also using good coding standards - (2011-08-19)
  [3542] What order are operations performed in, in a Perl expression? - (2011-12-07)
  [3574] Perl functions such as chop change their input parameters - (2012-01-10)
  [3917] BODMAS - the order a computer evaluates arithmetic expressions - (2012-11-09)
  [4324] Learning to program - variables and constants - (2014-11-22)


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Comments in and on Perl - a case for extreme OO programming
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INSERT, DELETE, REPLACE and UPDATE - changing the content of SQL tables
Object Orientation in an hour and other Perl Lectures
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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