/usr/lib/subvector.scm is in scheme9 2013.11.26-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2010
; Placed in the Public Domain
;
; (subvector vector integer1 integer2) ==> vector
;
; SUBVECTOR returns a fresh vector formed from the members of VECTOR
; beginning with index INTEGER1 (inclusive) and ending with index
; INTEGER2 (exclusive).
;
; Example: (subvector '#(a b c d e) 2 4) ==> #(c d)
; (subvector '#(a b c d e) 2 2) ==> #()
(define (subvector v p0 pn)
(let ((k (vector-length v)))
(cond ((<= 0 p0 pn k)
(vector-copy v p0 pn))
(else
(error "subvector: bad range" (list p0 pn))))))
|