Creating a method within a class

ruby-talk
1

I'm learning about method calling and object oriented programming in
Ruby. The book I'm reading gives an example about calling a method.

I have two methods:

a mainMethod and DOG class.

My mainMethod reads as follows:

require_relative 'dog'
class MAINMETHOD
  DOG.bark
end

My DOG class reads as follows:

class DOG
  def bark
    puts "woof"
  end
end

Whenever I try to run mainMethod, I get "undefined method `bark' for
DOG:Class (NoMethodError)"

Am I doing something wrong? Please help :confused:

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2

the way bark is defined it is an instance method
you need to create an instance of the DOG class to call it:
DOG.new.bark

or you change the definition of bark to be a class method:
def self.bark
...

which then can be called using the class

have a look at

more details

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On Fri, Jan 17, 2014 at 8:39 PM, Slipper Spe <lists@ruby-forum.com> wrote:

I'm learning about method calling and object oriented programming in
Ruby. The book I'm reading gives an example about calling a method.

I have two methods:

a mainMethod and DOG class.

My mainMethod reads as follows:

require_relative 'dog'
class MAINMETHOD
  DOG.bark
end

My DOG class reads as follows:

class DOG
  def bark
    puts "woof"
  end
end

Whenever I try to run mainMethod, I get "undefined method `bark' for
DOG:Class (NoMethodError)"

Am I doing something wrong? Please help :confused:

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Posted via http://www.ruby-forum.com/\.

3

Figured it out, can't believe I didn't think of it earlier-- I
dishonored my Java knowledge.

I completely forgot to call dog:

dogCaller = DOG.new
dogCaller.bark

Got caught up with learning Ruby and forgot my older principles.

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4

Please don't UPCASE all your classes man ... :stuck_out_tongue:

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