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Build up classes into applications sharing data types in Ruby
I've put together a "build-up" example showing code shared between multiple applications and using multiple classes in Ruby.
Start with stations.rb
which defines a railway station object and includes a factory to load a Hash of all UK stations. There's also a test program in there so that it can run stand-alone:
munchkin:lr grahamellis$ ruby stations.rb
Distance is 125.04
Distance is 125.04
Distance is 125.0
I then went on to add a (second) program that uses that class - see second
Another class is defined in journey.rb
and another program that uses both classes in third
... and so we could go on.
With all this build-up going on, the need for documentation of what's where becomes more important. You'll find the data file for the stations class on our website, but not the journey file as it contains personal information we can't put out in public. But we can show you and explain this program so YOU can be writing programs on our Ruby courses
. (written 2015-10-23)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articlesR108 - Ruby - More Classes and Objects 
Testing your new class - first steps with cucumber - (2015-10-23) 
Where does Ruby load modules from, and how to load from current directory - (2015-06-03) 
Changing what operators do on objects - a comparison across different programming languages - (2014-12-26) 
Standard methods available on all objects in Ruby - (2012-06-23) 
Private, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby? - (2012-06-23) 
Why you should use objects even for short data manipulation programs in Ruby - (2012-06-10) 
Ruby - a training example that puts many language elements together to demonstrate the whole - (2011-04-23) 
Ruby training - some fresh examples for string handling applications - (2011-02-05) 
Changing a class later on - Ruby - (2011-02-02) 
Private and Public - and things between - (2011-01-22) 
Ruby - examples of regular expressions, inheritance and polymorphism - (2010-10-02) 
What is a factory method and why use one? - Example in Ruby - (2010-09-30) 
The Multiple Inheritance Conundrum, interfaces and mixins - (2010-04-11) 
Object Oriented Ruby - new examples - (2010-02-03) 
Direct access to object variable (attributes) in Ruby - (2010-02-02) 
Defining a static method - Java, Python and Ruby - (2010-02-01) 
Tips for writing a test program (Ruby / Python / Java) - (2010-01-29) 
Ruby objects - a primer - (2010-01-29) 
Ruby - is_a? v instance_of? - what is the difference? - (2010-01-27) 
Object Orientation in Ruby - intermediate examples - (2009-07-16) 
Some Ruby programming examples from our course - (2008-03-21) 
What are factory and singleton classes? - (2007-06-04) 
Think about your design even if you don't use full UML - (2006-03-24) 
MTBF of coffee machines - (2005-01-20)
Some other Articles
Passing information into functions in C - by name, by valueRUby - loading, using, changing, storing JSON format dataScenario outlines - tables of values to test - in Gherkin / CucumberBuild up classes into applications sharing data types in RubyClarrissa-Marybelle - too long to really fit?Melksham - two small townships, or one big one?RUH Hopper - experience and thoughts forwardIs the RUH hopper a limited, duplicate service running unnecessarily and at high cost?Method, Class, Module, Package - how to they relate in Python?
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