Jon Pretty

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Jon has worked full-time as a Scala developer since 2004, and has been heavily involved in the Scala community for as long as it has existed.

He travels extensively, speaking on a variety of Scala topics at many Scala events worldwide, including talks on his open-source libraries, tools and original research into the Scala type system. He currently offers advanced Scala One training courses around Europe.

Jon chairs the Scala Center Advisory Board.

Sessions

In Defence of Subtyping

45' Talk

Scala is unique in combining a rich and expressive static type system with subtyping at its heart. The inclusion of subtyping adds significant complexity to the language, leading to features like type bounds and variance….

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