Thank you, Mark and Mike
Awesome explanation and examples
Plínio
On Sat, Jun 7, 2014 at 8:46 AM, Mike Fikes <mikefi...@me.com> wrote:
> Thanks for the historical perspective, puzzler!
>
> In addition to performance considerations, Clojure Programming points to an
> inconsistency between hash codes for longs and BigIntegers as a motivation.
>
> Using the example number from that excellent book on Clojure 1.5.1 (on Java
> 8, FWIW), I can cause this:
>
> #{6948736584 (biginteger 6948736584)}
>
> ; => #{6948736584 6948736584}
>
>
> #{6948736584 (bigint 6948736584)}
>
> ; => IllegalArgumentException Duplicate key: 6948736584
> clojure.lang.PersistentHashSet.createWithCheck (PersistentHashSet.java:56)
>
>
> (System/getProperty "java.version")
>
> ; => "1.8.0_05"
>
>
> (clojure-version)
>
> ; => "1.5.1"
>
>
> On Clojure 1.6, thankfully both fail, even in the face of the inconsistency
> between .hashCode implementations. If that essentially addresses the 2nd
> rationale for introducing a special BigInt class, maybe with both things
> being fixed with Java 8 and Clojure 1.6 BigInteger could come back as the
> sole arbitrary precision representation of ℤ.
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with your
> first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
