/usr/lib/s9fes/adjoin.scm is in scheme9 2010.11.13-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2010
; See the LICENSE file of the S9fES package for terms of use
;
; (adjoin object list) ==> list
;
; Add an element to a set.
;
; Example: (adjoin 'x '(a b c)) ==> (x a b c)
; (adjoin 'c '(a b c)) ==> (a b c)
(define (adjoin x a)
(if (member x a)
a
(cons x a)))
|