From: gabriele renzi <surrender_it@...>
Date: 2005-12-31T20:07:48+09:00
Subject: Re: Optional arguments and default values

Surgeon ha scritto:
> Hi,
> 
> How do I give a method optional arguments and default values?

 >> def f(a=1,b=2)
 >>  a+b
 >> end
=> nil
 >> f
=> 3
 >> f 2
=> 4
 >> f 2,3
=> 5

> Exmpl:
> 
> foo is a function that multiplies all of its arguments together. If
> there is not any argument, a default value of "qwerty" returns.
> 
> foo(2,3)    ---->  6
> foo(2,3,5) ----> 30
> foo(2,3,5,2) -> 60
> 
> foo() -----------> "qwerty"

maybe you want to get all the "rest" arguments with the "*"
declaration in the method like this:

 >> def foo(*args) # args are put in an array named args
 >>  return "qwerty" if args.empty?
 >>  args.inject do |acc,elem|
?>   acc*elem
 >>  end
 >> end
=> nil
 >> foo
=> "qwerty"
 >> foo 1,2,3,4
=> 24


But I suggest you take a look at some ruby tutorial, this are basic things.