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Diffstat (limited to 'src/content/pastebins/2021/09/02/sicp-3-19.adoc')
| -rw-r--r-- | src/content/pastebins/2021/09/02/sicp-3-19.adoc | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/src/content/pastebins/2021/09/02/sicp-3-19.adoc b/src/content/pastebins/2021/09/02/sicp-3-19.adoc deleted file mode 100644 index 166170f..0000000 --- a/src/content/pastebins/2021/09/02/sicp-3-19.adoc +++ /dev/null @@ -1,33 +0,0 @@ -= SICP exercise 3.19 -:categories: lisp programming-languages - -[source,scheme] ----- -(define (cycle? l) - (define (rec l x) - (cond - ((null? x) false) - ((eq? l x) true) - (true (rec l (cdr x))))) - (rec l (cdr l))) ----- - -Sample interactive session: - -[source,scheme] ----- -scheme@(guile-user)> (define true #t) -scheme@(guile-user)> (define false #f) -scheme@(guile-user)> -(define (cycle? l) - (define (rec l x) - (cond - ((null? x) false) - ((eq? l x) true) - (true (rec l (cdr x))))) - (rec l (cdr l))) -scheme@(guile-user)> (cycle? '(1 2 3)) -$9 = #f -scheme@(guile-user)> (cycle? (make-cycle '(1 2 3))) -$10 = #t ----- |