From: Andrew Timberlake <andrew@...>
Date: 2008-01-08T21:39:56+09:00
Subject: Re: Defining a function inside a function. Whats this feature ? How to use inside a class ?

Sur

Two things come to mind, are you wanting class methods or instance methods?
With the first one, class methods, you don't have to create an instance of
Person (I don't think this is what you want) and you simply call the methods
directly from the class
With the second, instance methods, you need to create an instance of the
Person using Person.new and then call the methods on the object.

#Class methods:
class Person
    def Person.author
        p "I am author"
    end
    def Person.reader
        p "I am reader"
    end
end
Person.author # -> I am author
Person.reader # -> I am reader


#Instance methods:
class Person
    def author
        p "I am author"
    end
    def reader
        p "I am reader"
    end
end
person = Person.new
person.author # -> I am author
person.reader # -> I am reader

Andrew Timberlake
andrew@andrewtimberlake.com
082 415 8283
skype: andrewtimberlake

"I have never let my schooling interfere with my education."
                                                --Mark Twain


-----Original Message-----
From: Sur [mailto:sur.max@gmail.com] 
Sent: 08 January 2008 02:16 PM
To: ruby-talk ML
Subject: Defining a function inside a function. Whats this feature ? How to
use inside a class ?

Hi Everyone,

I am not sure if I have seen it being used earlier or probably I don't know
how to use it.

when I define function(s) inside a function within the main object, it
works...

def person
  def author
    p "I am author"
  end
  def reader
    p "I am reader"
  end
end

Now, if I call

person.author # => I am author
person.reader # => I am reader

And it works fine with any hierarchy.
The same thing doesn't seem to work inside a class.

Any explanation ?

Thanks!

-- 
sur
"is a String object" is a String object
hacking over objects
http://expressica.com


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