On Sat, 28 Dec 2013 17:15:25 -0500 (EST) "J. Ian Johnson" <i...@ccs.neu.edu> wrote:
> You want to make sure your structs are inspectable. You can define > your structs with the #:transparent option or define your own > equality relation with the gen:equal+hash generic interface. -Ian Aah, ok I got it. In my source with the hash table I indeed used #:transparent which made equal? work as I expected. Thanks for clarifying. -- Manfred > ----- Original Message ----- From: Manfred Lotz > <manfred.l...@arcor.de> To: > users@racket-lang.org Sent: Sat, 28 Dec 2013 > 15:41:28 -0500 (EST) Subject: [racket] hash table confusion > > I have a hash table (created by using make-hash) where the key is a > struct. This seems to work fine although the documentation says > The make-hash procedure creates a table where keys are compared > with equal?,... > > and it seems that equal? gives #f if I compare two structs having the > same contents: > > > (struct cpd (x y)) > > (define C1 (cpd 1 "bla")) > (define C2 (cpd 1 "bla")) > > (equal? C1 C2) > #f > > > Why does my hash table work fine? In my hash handling I'm using > make-hash, hash-ref!, hash-set!, hash-for-each. > ____________________ Racket Users list: http://lists.racket-lang.org/users
