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Choosing among object/class/module/top-level methods...

Sam Kong

7/13/2006 10:35:00 PM

Hi, Rubyists!

Whenever I try to make a quick solution program,
I stop for a moment to think which approach I should take.

Let's say that you want to make a puzzle-solver (like Sudoku-solver)
and it's made up of one 'solve' method and several helper methods.

Which is your preferred way among the following?
And why?

[1]

def solve_sudoku problem
...
end

def helper1 args
...
end

def helper2 args
...
end

puts solve_sudoku "15000..00358"


[2]

class Sudoku

def initialize problem
...
end

private

def helper1
...
end

def helper2
...
end
end

sudoku = Sudoku.new "15000..00358"
puts sudoku.solve


[3]

class Sudoku

class << self
def solve problem
...
end

private
def helper1
...
end

def helper2
...
end
end
end

puts Sudoku.solve "15000..00358"

[4]

module Sudoku

class << self
def solve problem
...
end

private

def helper1
...
end

def helper2
...
end
end
end


end

puts Sudoku.solve "15000..00358"




I'm a big fan of Object-orientation.
But if the object's life-span is as short as Solver.new(problem).solve,
I'm really hesitant to create an object when a simple method call will
do.
Am I thinking of a worthless subjective thing?

Do you have any criteria about going for object/class/module/top-level
methods?

Thanks.

Sam

--
Posted via http://www.ruby-....
3 Answers

Ara.T.Howard

7/13/2006 10:44:00 PM

0

Sam Kong

7/13/2006 10:49:00 PM

0

unknown wrote:
> solver = prototype{
> @some_instance_var
>
> def solve
> something @some_instance_var
> end
>
> def something arg
> end
> }

I haven't checked out your library yet.
Can you set visibility on methods?
Helper methods don't have to be public.

Probably I need to see your library first.

I'll talk to you again.

Sam

--
Posted via http://www.ruby-....

Ara.T.Howard

7/13/2006 10:59:00 PM

0