From: "SHIGETOMI, Takuhiko" <tshiget1@...>
Date: 2005-08-29T11:44:01+09:00
Subject: Re: [Q] how to unflatten a flat-array

greetings, David. how nice it is!

> I've got a method from long ago that might fit:
> 
>    class Array    # or do it as a module, or whatever
>      def in_slices_of(n)
>        res = []
>        0.step(size - 1, n) do |i|
>          s = slice(i...i + n)
>          yield s if block_given?
>          res.push s
>        end
>        res
>      end
>    end
> 
>    [1,2,3,4,5,6].in_slices_of(2)  # =>  [[1, 2], [3, 4], [5, 6]]
>    [1,2,3,4,5,6].in_slices_of(3)  # => [[1, 2, 3], [4, 5, 6]]
> 
> It handles odd numbers by putting whatever's left over in its own
> array:
> 
>    [1,2,3,4,5,6,7].in_slices_of(2)  # => [[1, 2], [3, 4], [5, 6], [7]]

quick question. (sorry, i am still screwed up.)
will the yieldee ( = the block ) 's 2nd parameter be nil at the end of
the case of odd number as above ?

-- 
<name species-designation="5618" default-lang="ja_JP">SHIGETOMI,Takuhiko</name>
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