From: bhbrinckerhoff@... (Ben)
Date: 2004-11-20T20:33:10+09:00
Subject: Re: meaning of #slice

Yeah the naming is a bit confusing. Probably the best way to get this
functionality to to add a method to the Array class

def new_slice(num)
        outer = []
        inner = nil
        each_index do |i|
                if i % num == 0
                        inner = []
                        outer << inner
                end                   
                inner << slice(i)
        end
        return outer
end

Then you can just do 

[1,2,3,4,5,6].new_slice(2)#=>[[1, 2], [3, 4], [5, 6]] 
[1,2,3,4,5,6].new_slice(3)#=>[[1, 2, 3], [4, 5, 6]]
[1,2,3,4,5].new_slice(2)  #=>[[1, 2], [3, 4], [5]]
[1,2,3,4,5].new_slice(5)  #=>[[1, 2, 3, 4, 5]]
[1,2,3,4,5].new_slice(4)  #=>[[1, 2, 3, 4], [5]]
[1,2,3,4,5].new_slice(6)  #=>[[1, 2, 3, 4, 5]]

It's probably not as concise or clever as your were hoping :) but
it'll do the job.

Ben







"trans.  (T. Onoma)" <transami@runbox.com> wrote in message news:<200411190820.08927.transami@runbox.com>...
> Are Enumerator#each_slice and #enum_slice properly named? All they take is an 
> integer which groups the enumerator's elements:
> 
>   [1,2,3,4,5,6].to_enum.enum_slice(2).to_a
>   #=> [[1,2],[3,4],[5,6]]
> 
> Yet Array#slice does nothing of the sort:
> 
>   [1,2,3,4,5,6].slice(2)
>   #=> 3
> 
> Also, how does one achieve #enum_slice functionality without Enumerator using 
> only Array?
> 
> T.