On May 9, 10:08 am, "ara.t.howard" <ara.t.how...@[...].com>  wrote:
>  On May 9, 2008, at 8:35 AM, yermej wrote:
> 
>  > a = %w(a b c d e f g h i j k)
>  > 1.upto(a.size) {|i| a.delete_at i}
> 
>  it does, but accidentally:
> 
>  cfp:~ > cat a.rb
> 
>  a = %w(a b c d e f g h i j k)
> 
>  1.upto(a.size) do |i|
>     puts '---'
>     p :i => i
>     p :before => a
>     a.delete_at i
>     p :after => a
>  end
> 
>  cfp:~ > ruby a.rb
>  ---
>  {:i=>1}
>  {:before=>["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"]}
>  {:after=>["a", "c", "d", "e", "f", "g", "h", "i", "j", "k"]}
>  ---
>  {:i=>2}
>  {:before=>["a", "c", "d", "e", "f", "g", "h", "i", "j", "k"]}
>  {:after=>["a", "c", "e", "f", "g", "h", "i", "j", "k"]}
>  ---
>  {:i=>3}
>  {:before=>["a", "c", "e", "f", "g", "h", "i", "j", "k"]}
>  {:after=>["a", "c", "e", "g", "h", "i", "j", "k"]}
>  ---
>  {:i=>4}
>  {:before=>["a", "c", "e", "g", "h", "i", "j", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "j", "k"]}
>  ---
>  {:i=>5}
>  {:before=>["a", "c", "e", "g", "i", "j", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>6}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>7}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>8}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>9}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>10}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
>  ---
>  {:i=>11}
>  {:before=>["a", "c", "e", "g", "i", "k"]}
>  {:after=>["a", "c", "e", "g", "i", "k"]}
> 
>  look carefully at what's happening for i >= 6.
> 
>  the indexes map only by accident since each delete modifies the
>  mapping in the array (size reduced by one after each delete)
> 
>  a @http://codeforpeople.com/
>  --
>  we can deny everything, except that we have the possibility of being
>  better. simply reflect on that.
>  h.h. the 14th dalai lama

Oops...I really should have noticed that. In a hurry, I guess. I'll
vote for:

a = %w(a b c d e f g h i j k)
1.upto(a.size/2) {|i| a.delete_at i}

as the accidentally obfuscated solution of the day.