Episode 4

Pizza 6.00

Talks 6.30

Dumb pattern matching tricks Arnold deVos
Querying a Dataset with Scala's Pattern Matching

Type Classes as Object and Implicits Charles O'Farrell
What are type classes, how can they help and why can't we
get them in stupid ol' Java?

A Monoid for Calculating Distributed Averages Karl Roberts
What is a Monoid anyway and how you might use one in The Real World™

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  • Eric T.

    Arnold de Vos presentation on pattern matching was almost too good: new content showing the relationships between Extractors/PartialFunction/Functions returning Option, good progression in the slide and compelling examples illustrating the solution. But it was so good that no one had questions at the end!

    February 9, 2012

  • Jed W.

    This one was more for the converted than a call to arms for the fence sitters. A couple of fence-sitters were not brought along due to the reasonable level of assumed knowledge of some of the content. This is always an issue, where to pitch the content.

    Great group of attendees, would like to have more time to chat.

    February 9, 2012

  • Jed W.

    Awesome, done!

    Also, note that there is a scalasyd google group for comments/discussions:

    February 1, 2012

  • Arnold d.

    Jed, I don't know if you remember me but I was at the meeting before last. I am the one using scala in the electric power industry. I can do a little session at the REPL which could be called "Dumb pattern matching tricks". The bigger concept is that scala pattern matching is easily expanded to a complete little language. This is based on an old blog post of mine: http://notes.langdale.com.au/Querying_a_Dataset_with_Scala_s_Pattern_Matching.html and there is nothing very complicated.

    February 1, 2012

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