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Sample class used in sharing example
More Classes and Objects example from a Well House Consultants training course
More on More Classes and Objects [link]

This example is described in the following article(s):
   • Build up classes into applications sharing data types in Ruby - [link]
   • Testing your new class - first steps with cucumber - [link]
   • Scenario outlines - tables of values to test - in Gherkin / Cucumber - [link]

Source code: stations.rb Module: R108
# Sample class used in sharing example

# class defintion - all the internal stuff!

class Station
        def initialize(raw)
                @info = raw.chomp.split("\t")
        end
        def getTLC()
                @info[1]
        end
        def getPassengers()
                @info[-1].to_i
        end
        def getFullName()
                @info[6]
        end
        def getLat()
                @info[4].to_f
        end
        def getLong()
                @info[5].to_f
        end
        def getDistance(toWhere)
                lat1 = getLat()
                lat2 = toWhere.getLat
                long1 = getLong
                long2 = toWhere.getLong
                diff_x = (lat1 - lat2 ) * 75.0
                diff_y = (long1 - long2 ) * 50.0
                dist = Math.sqrt(diff_x * diff_x + diff_y * diff_y)
        end
        def getDistanceText(toWhere,places=2)
                actual = getDistance toWhere
                "%.#{places}f" % actual
        end
end

def loadStationFactory
        all = {}
        File.new("rstats2014.xyz").readlines.each do |record|
                current = Station.new record
                tlc = current.getTLC
                all[tlc] = current
        end
        return all
end

# ------------------------------------------

# first (test) program

# No need to understand the internal / data file format in the user or test program

if __FILE__ == $0

        all = loadStationFactory
        puts all["PLY"].getPassengers()
        puts all["PLY"].getFullName()

        # This not brilliant - formatting an interstation distance should be in the class
        distance = all["PLY"].getDistance all["MKM"]
        puts "Distance is #{'%.2f'%distance}"

        dtext = all["PLY"].getDistanceText all["MKM"]
        puts "Distance is #{dtext}"

        # optional parameter - number of decimal places (default is 2)
        dtext = all["PLY"].getDistanceText all["MKM"],1
        puts "Distance is #{dtext}"
else
        puts "Loaded #{__FILE__} into #{$0} - my copyright!"
end
Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Ruby
 * Ruby Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Ruby are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "More Classes and Objects" training module. You'll find a description of the topic and some other closely related examples on the "More Classes and Objects" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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