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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