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Task/Ordered-words/EchoLisp/ordered-words.echolisp

@@ -0,0 +1,26 @@
+(define (ordered? str)
+  (for/and ([i (in-range 1 (string-length str))])
+    (string-ci<=? (string-ref str (1- i)) (string-ref str i))))
+
+(define (ordre words)
+(define wl 0)
+(define s 's)
+	(for/fold (len 0) ((w words))
+		(set! wl (string-length w))
+		#:continue (< wl len)
+		#:when (ordered? w)
+		#:continue (and (= len wl) (push s w))
+		(push (stack s) w) ;; start a new list of length wl
+		wl)
+	(stack->list s))
+	
+;; output
+(load 'unixdict)
+(ordre (text-parse unixdict))
+   → (abbott accent accept access accost almost bellow billow biopsy chilly choosy choppy effort floppy glossy knotty)
+
+;; with the dictionaries provided with EchoLisp
+;; french
+  → (accentué) ;; ordered, longest, and ... self-reference
+;; english
+  → (Adelops alloquy beefily begorry billowy egilops)