> I am writing some code with json. Request may look likes (hasheq 'action > "doit" 'arg1 "a" 'arg2 "b"). > > Is there any function or library which can apply a proc with hasheq? The > expected result is (proc #:action "doit" #:arg1 "a" #:args "b")?
Would keyword-apply work for you? http://docs.racket-lang.org/reference/procedures.html#(def._((lib._racket/private/base..rkt)._keyword-apply)) To apply in your situation, perhaps something like this: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;; #lang racket (define (hash->keyword-apply f a-hash [rest-args '()]) (define-values (keys vals) (for/fold ([keys '()] [vals '()]) ([(k v) (in-hash a-hash)]) (values (cons (string->keyword (symbol->string k)) keys) (cons v vals)))) (keyword-apply f keys vals rest-args)) (define (f #:x x #:y y) (list x y)) (hash->keyword-apply f #hash((x . 3) (y . 4))) ____________________ Racket Users list: http://lists.racket-lang.org/users
