From: Robert Klemme <shortcutter@...>
Date: 2009-10-26T21:17:17+09:00
Subject: Re: Array Number of Leaves

2009/10/26 salai <sayakyi@gmail.com>:
> Dear Rubyist,
>
> I want to count array list [1,2,3,[4],5] ---> # 5 leaves
> but I always get sum_of_array.
>
> Where did I do wrong?
>
>
>        def array_leave1 # sum_of_array?

The method should have the same name as the one you call below
("elem.sum_of_array").

>                res = 0
>                self.each{|elem|
>                        if elem.kind_of?(Array)
>                                res += elem.sum_of_array
>                        else
>                                res += elem
>                        end
>                }
>                return res
>        end
>
> def number_of_leaves
>    self.inject(0){|acc,x|
>        if x.kind_of?(Array)
>          acc += x.number_of_leaves
>        else
>          acc += x

The line above should read acc += 1.  You could even simplify that as

acc += (x.number_of_leaves rescue 1)

>        end
>      }
>  end

Not sure what your issue is exactly.  Please show the complete code
along with expected results.  The code you presented cannot be the
real code because at least the class declaration is missing.

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/