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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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© 2006-2013 Andrew Cooke (site) / post authors (content).

JavaGI - Type Classes in Java

From: "andrew cooke" <andrew@...>

Date: Sat, 23 Dec 2006 19:37:12 -0300 (CLST)

This is an interesting paper.  You might want to read it before my comments.

http://homepages.cwi.nl/~ralf/JavaGI/
http://homepages.cwi.nl/~ralf/JavaGI/paper.pdf

I enjoyed it largely because it helped clear my mind about the
relationship between Haskell and Java.  I walked down the road after
reading the first few pages, to buy some food from the local supermarket,
and on the way back was thinking "hmmm - it's not so much type classes, as
quantified existential types".  And, of course, then I read the section on
exactly that.  Which made me feel a bit less stupid than normal :o)

However, I don't think they have a snowball in hell's chance of getting
that accepted into a future Java release.  It's too big a change, and not
sufficiently orthogonal to what is already in the language - seems like
"implementation"s could replace classes, rather than augment them.

Andrew

Blog Posts related to Java GI

From: "andrew cooke" <andrew@...>

Date: Sat, 23 Dec 2006 19:54:14 -0300 (CLST)

Forgot to include these - they make more sense after reading the paper
(and help explain it).
http://blogs.msdn.com/ralflammel/archive/2006/12/23/generalized-vs-dynamic-interfaces.aspx
http://blogs.msdn.com/ralflammel/archive/2006/12/21/more-haskell-in-java-7-or-8.aspx

If dynamic typing is "strong duck typing" (I think that's good), maybe
Java interfaces could be called "static duck typing".  If that makes sense
then I guess that was what the secon dpost was trying to say and I'm
over-explaining the joke...

Andrew

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