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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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

It's when you teach object orientation - the fully Monty, including inheritance, static and dynamic methods and variables, and so on - to a complete novice to programming and that person finds it's one of the easiest parts of the course that you realise:

a) Just how many bad ole habits us ancient structure programmers have gotten ourselves into and ...

b) What an excellent and natural Object system languages like Ruby have. T hat's as compared to C++ with a bevy of files, Java with so much security it obscures the simplicity, or Perl with so many options and so much ability to sidestep objects. (Python has a similar, and great, philosophy too)

Here are the 'second level' examples from today - not the basic object stuff, which you'll find if you look back a couple of days.

[link] Single class example for extension by inheritance

[link] Object and Class variables (dynamic and static)

[link] Static Method in Ruby

[link] Inheritance in Ruby
(written 2009-07-16, updated 2009-07-17)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
R108 - Ruby - More Classes and Objects
  [184] MTBF of coffee machines - (2005-01-20)
  [656] Think about your design even if you don't use full UML - (2006-03-24)
  [1217] What are factory and singleton classes? - (2007-06-04)
  [1587] Some Ruby programming examples from our course - (2008-03-21)
  [2601] Ruby - is_a? v instance_of? - what is the difference? - (2010-01-27)
  [2603] Ruby objects - a primer - (2010-01-29)
  [2604] Tips for writing a test program (Ruby / Python / Java) - (2010-01-29)
  [2616] Defining a static method - Java, Python and Ruby - (2010-02-01)
  [2620] Direct access to object variable (attributes) in Ruby - (2010-02-02)
  [2623] Object Oriented Ruby - new examples - (2010-02-03)
  [2717] The Multiple Inheritance Conundrum, interfaces and mixins - (2010-04-11)
  [2977] What is a factory method and why use one? - Example in Ruby - (2010-09-30)
  [2980] Ruby - examples of regular expressions, inheritance and polymorphism - (2010-10-02)
  [3142] Private and Public - and things between - (2011-01-22)
  [3154] Changing a class later on - Ruby - (2011-02-02)
  [3158] Ruby training - some fresh examples for string handling applications - (2011-02-05)
  [3260] Ruby - a training example that puts many language elements together to demonstrate the whole - (2011-04-23)
  [3760] Why you should use objects even for short data manipulation programs in Ruby - (2012-06-10)
  [3781] Private, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby? - (2012-06-23)
  [3782] Standard methods available on all objects in Ruby - (2012-06-23)
  [4366] Changing what operators do on objects - a comparison across different programming languages - (2014-12-26)
  [4504] Where does Ruby load modules from, and how to load from current directory - (2015-06-03)
  [4550] Build up classes into applications sharing data types in Ruby - (2015-10-23)
  [4551] Testing your new class - first steps with cucumber - (2015-10-23)

R105 - Ruby - Classes and Objects
  [983] Blessing in Perl / Member variable in Ruby - (2006-12-14)
  [1925] Introduction to Object Oriented Programming - (2008-12-06)
  [2609] Scope of variables - important to Ruby on Rails - (2010-01-31)
  [2651] Calculation within objects - early, last minute, or cached? - (2010-02-26)
  [3421] Ruby off the Rails? - (2011-09-06)
  [4009] Clear, concise examples - Ruby classes and objects. - (2013-02-17)
  [4502] Reading and parsing a JSON object in Ruby - (2015-06-01)


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Some other Articles
Variable scope - what is it, and how does it Ruby?
The dog is not in trouble
Can you learn to program in 4 days?
Regular Expressions in Ruby
Object Orientation in Ruby - intermediate examples
Collection objects (array and hash) in Ruby
Opening and reading files - the ruby fundamentals
pre-Inaugural briefing - Melksham Community Area Partnership
Wiltshire Community Area Partnerships
Learning to program in Ruby - examples of the programming basics
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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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