gistfile1.txt

#lang scratch

(define (better-keyword-apply func args)
  (define-values (kws rest)
    (let loop ([args args]
               [kw '()]
               [rest '()])
      (cond
        [(null? args) (values kw rest)]
        [(keyword? (first args))
         (loop (cddr args)
               (cons (cons (first args) (second args)) kw)
               rest)]
        [else
         (loop (cdr args)
               kw
               (cons (car args) rest))])))
  (define sorted-kws (sort kws keyword<? #:key car))
  (keyword-apply func
                 (map car sorted-kws)
                 (map cdr sorted-kws)
                 (reverse rest)))

(module+ test
  (define (f a #:x x #:y y [z "blue"])
    (list a x y z))

  (better-keyword-apply f '(7 #:y 5 #:x 6))
  (better-keyword-apply f '(#:x 5 7 #:y 12 6)))