On Thursday, June 11, 2015 at 2:19:56 PM UTC-5, Andy Fingerhut wrote:
>
> You can override hashCode and/or hasheq methods in deftype.
>

I've been unable to do it.  Is there something special needed to allow this 
to work?

user=> (defrecord Foo [x] Object (hashCode [this] 42))
CompilerException java.lang.ClassFormatError: Duplicate method 
name&signature in class file user/Foo, 
compiling:(/private/var/folders/hv/hv6wzwrEFOujYN382REV6++++TI/-Tmp-/form-init7644007787939926514.clj:1:1)
 


user=> (defrecord Foo [x] Object (hasheq [this] 42))
CompilerException java.lang.ClassFormatError: Duplicate method 
name&signature in class file user/Foo, 
compiling:(/private/var/folders/hv/hv6wzwrEFOujYN382REV6++++TI/-Tmp-/form-init7644007787939926514.clj:1:1)
 

 
> If the reason that defrecord hashing is slow in your application is 
because _hasheq_ recalculates the hash values from scratch each
> time, without _caching the value_, consider voting for this ticket so 
that is improved in the future: http://dev.clojure.org/jira/browse/CLJ-1224

I'm not sure whether this might be a part of what I'm experiencing, but I 
didn't know about the ticket-voting process.  I'll look into that.

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