Comparator.compare returns an int. (int 0.2) and (int -0.2) both
return 0. Thus, your comparator is returning 0, saying "I don't care
what order these go in".

On Mar 29, 6:44 pm, JvJ <kfjwhee...@gmail.com> wrote:
> Alright check this out:
>
> ;; Normal subtraction as comparator sorts in ascending order
> (sort-by identity #(- %1 %2)   [1  -1])
> (-1 1)
>
> ;; Reverse subtraction as comparator sorts in descending order
> (sort-by identity #(- %2 %1)   [1  -1])
> (1 -1)
>
> ;;=======================================
> ;; And now with values of -0.1, 0.1
>
> ;; Reverse subtraction as comparator sorts in descending order
> (sort-by identity #(- %2 %1)   [0.1  -0.1])
> (0.1 -0.1)
>
> ;; Normal subtraction STILL sorts in descending order??
> (sort-by identity #(- %1 %2)   [0.1  -0.1])
> (0.1 -0.1)

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