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======Z7.scm====== #!/usr/bin/env racket #lang racket/base 7. zpravidla vyhodnocovacky (list cons 'a 10) ++=>|'(# a 10)++ (((lambda x) x) 'a 'b 'c) ;error nebo blbe zadani ((let ((x -)) x) 10 20 30) ++=>| -40++ ((car (list map)) - '(1 2 3)) ++=>| '(-1 -2 -3)++ (or 1 foo 2) ++=>| 1++ (apply list '(a b) '(c d)) ++=>| '%%((a b) c d)%%++ (eval (let ((x 5)) (lambda (y x)))) ;error nebo blbe opsano ((lambda (x) `(x `(,x ,,x))) 10) ++=>|'(x `(,x ,10))++ ((lambda (x) `(x `(,x ,,x))) 10) ; |_| |\__,x je vnejsi, pro (x 10) ; |____| vnitrni quasiquote se nevyhodnoti ;bezprostředně aplikovaná ((lambda ...) 10) vrací '(x `(,x ,10))) (cadar '((a b) (c d) (e f))) ++=>| 'b++ (let x ((y 10)) (list x y)) ++=>|'( 10)++ ; vim: syntax=racket