diff options
Diffstat (limited to 'prelude.scm')
| -rw-r--r-- | prelude.scm | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/prelude.scm b/prelude.scm index 1a8d853..a3b123e 100644 --- a/prelude.scm +++ b/prelude.scm @@ -15,10 +15,18 @@ (define cddar (lambda (x) (car (cdr (cdr x))))) (define cdddr (lambda (x) (car (cdr (cdr x))))) +; my favorite! +(define cdaddr (lambda (x) (cdr (car (cdr (cdr x)))))) + (define if (lambda (pred tval fval) (cond (pred tval) (else fval)))) (define not (lambda (x) (if x #f #t))) (define abs (lambda (x) (if (> x 0) x (* -1 x)))) -;(define for-each map) +(define map + (lambda (f l) + (cond ((null? l) ()) + (else (cons (f (car l)) (map f (cdr l))))))) + +(define for-each map) ;(define compose (lambda (f g) (lambda args (f (apply g args))))) |