Hi Simon

I only use macros sparingly, and sympathise with your struggles to develop

Some simple macros can be written quite simply using define-syntax-rule/s
and aren't that much more complex than writing functions.

To milk a bit more from this example, here's a similarly themed function:

#lang racket

(define (hex/f hs)
  (apply bytes
         (for/list ([h hs])
           (string->number (~a h) 16))))

(hex/f '(a b c 1 2 3 41 42 43)) ; #"\n\v\f\1\2\3ABC"

The (marginal) advantage of the macro, of course, is that we can omit the
quote from the function call.


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