Re: Delete every other value in an array

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Delete every other value in an array
\ Tim Conner (9 May 2008)
. \ Harry Kakueki (9 May 2008)
. . \ Harry Kakueki (10 May 2008)
. . . \ Harry Kakueki (11 May 2008)
. \ yermej (9 May 2008)
. . \ ara.t.howard (9 May 2008)
. \ Raúl GutiérrezS. (9 May 2008)
. . \ ara.t.howard (9 May 2008)
. \ James Gray (9 May 2008)
. \ ara.t.howard (9 May 2008)
. \ Robert Dober (9 May 2008)
. . \ Robert Dober (9 May 2008)
. \ Joel VanderWerf (10 May 2008)
. \ yermej (10 May 2008)
. \ 7stud -- (10 May 2008)
. . \ David A. Black (10 May 2008)
. . . \ 7stud -- (10 May 2008)
. \ S2 (10 May 2008)

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Subject:	Re: Delete every other value in an array
Group:	Ruby-talk
From:	Harry Kakueki
Date:	11 May 2008

>>
>>
>
> Oops. My code has a bug.
>
> arr = %w[a b c d b f g h i j k l m]
>
> p arr.select{|x| arr.index(x) % 2 == 0}#> ["a", "c", "g", "i", "k", "m"]
>
> res = []
> (0...arr.length).step(2) {|x| res << arr[x]}
> p res #> ["a", "c", "b", "g", "i", "k", "m"]
>
> Harry
>
>
Or not. :)
Which do you want?

Harry

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