From: Tim Pease <tim.pease@...>
Date: 2006-07-25T01:07:19+09:00
Subject: Re: Dumb question about assigments

Ruby only allows a single value to be assigned using the = operator.
However, you can assign an array to multiple values:

a, b = [1, 2]
puts a       #=> 1
puts b       #=> 2

When you try to assign multiple values using the = operator you
defined, Ruby is converting the arguments on the right hand side into
an array; hence the "1 for 2" argument error you mentioned.  I would
try something like this

class BlahBlah
  def something=( *args )
    x, y = args
    puts x
    puts y
  end
end

BlahBlah.new.something = 1
BlahBlah.new.something = 1, 2

#=> 1
#=> nil

#=> 1
#=> 2

In the first assignment, y gets the value of nil.

Hope this helps :)

TwP


On 7/24/06, Andrew Huh? <genooma@gmail.com> wrote:
> Hi, I feel kind of dumb for asking this, but I can't honestly find the
> answer anywere.
>
> I came across a attribute defined like:
> class BlahBlah
>    def something=(x,y)
>        #code
>    end
> end
>
> I tried to assign the values as:
> BlahBlah.something=(5,10)
> and
> BlahBlah.something=5,10
> and
> BlahBlah.something(5,10)
>
> but all give me a "1 for 2" argument error (except for the last which
> don't work because something is not a method).
> All examples I came across either used only one argument, or defined
> something as a method (strip the =).
>
> How can I assign values to this tipe of attribute?
> thanks
>
> --
> Posted via http://www.ruby-forum.com/.
>
>