44 lines
1.5 KiB
Scheme
44 lines
1.5 KiB
Scheme
; Copyright (c) 2003 RT Happe <rthappe at web de>
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; See the file COPYING distributed with the Scheme Untergrund Library
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;;; `vector names' for the sequence procedures specialised to vectors, and
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;;; some constructors or the like: list->vector vector-tabulate
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(define subvector subsequence)
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(define vector-copy sequence-copy)
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(define vector-copy! sequence-copy!)
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(define vector-fill! sequence-fill!) ; with opt. start & end
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(define vector-tabulate! sequence-tabulate!)
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(define vector-append sequence-append)
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(define vector-map sequence-map)
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(define vector-map-into! sequence-map-into!)
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(define vector-for-each sequence-for-each)
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(define vector-fold sequence-fold)
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(define vector-fold-right sequence-fold-right)
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(define vector-null? sequence-null?)
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(define vector-any sequence-any)
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(define vector-every sequence-every)
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(define vector= sequence=)
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(define vectors-map sequences-map)
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(define vectors-map-into! sequences-map-into!)
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(define vectors-for-each sequences-for-each)
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(define vectors-fold sequences-fold)
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(define vectors-fold-right sequences-fold-right)
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(define vectors-any sequences-any)
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(define vectors-every sequences-every)
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(define vectors= sequences=)
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;; redefine with opts
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(define (list->vector xs . opts)
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(let-optionals opts ((start 0) (end (length xs)))
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(assert (<= 0 start end))
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(let ((v (make-vector (- end start))))
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(do ((i start (+ i 1))
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(ys (drop xs start) (rest ys)))
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((= i end) v)
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(vector-set! v (- i start) (first ys))))))
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(define (vector-tabulate proc len)
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(vector-tabulate! (make-vector len) 0 proc len))
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