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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
199087 changed files with 3378941 additions and 0 deletions
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11
Task/Singly-linked-list-Element-insertion/EchoLisp/singly-linked-list-element-insertion.l Normal file
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(define (insert-after lst target item)
(when (null? lst) (error "cannot insert in" null))
(let [(sub-list (member target lst))]
(if sub-list (set-cdr! sub-list (cons item (cdr sub-list))) ; make chirurgy if found
(nconc lst item)))) ; else append item
(define L '(a b))
(insert-after L 'a 'c)
L → (a c b)
(insert-after L 'x 'y)
L → (a c b y)