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Task/Knuth-shuffle/EchoLisp/knuth-shuffle.echolisp

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+Remark- The native '''shuffle''' function implementation  in EchoLisp has been replaced by this one.
+ Thx Rosetta Code.
+(lib 'list) ;; for list-permute
+
+;; use "inside-out" algorithm, no swapping needed.
+;; returns a random permutation vector of [0 .. n-1]
+(define (rpv n (j))
+(define v (make-vector n))
+	(for [(i n)]
+		(set! j (random (1+ i)))
+		(when (!= i j) (vector-set! v i [v j]))
+		(vector-set! v j i))
+	v)
+	
+;; apply to any kind of list
+(define (k-shuffle list)
+	(list-permute list (vector->list (rpv (length list)))))
+	
+;; out
+(k-shuffle (iota 17))
+    → (16 7 11 10 0 9 15 12 13 8 4 2 14 3 6 5 1)
+	
+(k-shuffle
+'(adrien 🎸 alexandre 🚂  antoine  🍼 ben 📚   georges 📷   julie 🎥 marine 🐼 nathalie 🍕 ))
+    → (marine alexandre 🎥 julie 🎸 ben 🍼 nathalie 📚 georges 🚂 antoine adrien 🐼 📷 🍕)
+
+(shuffle ;; native
+'(adrien 🎸 alexandre 🚂 antoine 🍼 ben 📚 georges 📷 julie 🎥 marine 🐼 nathalie 🍕 ))
+    → (antoine 🎥 🚂 marine adrien nathalie 🍼 🍕 ben 🐼 julie 📷 📚 🎸 alexandre georges)