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