in[2:end] - in[1:end-1]

On Saturday, February 7, 2015 at 7:19:39 AM UTC-5, Evan Pu wrote:
>
> say I want to compute a pair-wise diff for all the elements in the array.
> input:        [1, 2, 4, 7, 8]
> output:        [1, 2, 3, 1]
>
> is there some kind of "beautiful" way of doing it? i.e. w/o using a for 
> loop nor using explicit indecies
>

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