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Let's Lens

YOW! Lambda Jam 2019

Let's Lens presents a series of exercises, in a similar format to the Data61 functional programming course material. The subject of the exercises is around the concept of lenses, initially proposed by Foster et al., to solve the view-update problem of relational databases.

The theories around lenses have been advanced significantly in recent years, resulting in a library, implemented in Haskell, called lens.

This workshop will take you through the basic definition of the lens data structure and its related structures such as traversals and prisms. Following this we implement some of the low-level lens library, then go on to discuss and solve a practical problem that uses all of these structures.

Edward Kmett

Chair of the Haskell Core Libraries Committee, Research Engineer

Machine Intelligence Research Institute

United States

Edward spent most of his adult life trying to build reusable code in imperative languages before realizing he was building castles in sand. He converted to Haskell in 2006 while searching for better building materials. He now chairs the Haskell core libraries committee, collaborates with hundreds of other developers on over 250 projects on github, works on ways to try to better scale functional programming, logic programming and formal methods at the Machine Intelligence Research Institute, and is obsessed with finding better tools so that seven years from now he won’t be stuck solving the same problems with the same tools he was stuck using seven years ago.

Tony Morris

Sr. Software Engineer

Queensland FP Lab, Data61

Australia

Tony Morris is a software product developer who has deployed functional programming techniques in industry for over 10 years. Tony teaches at the tertiary level and for professional programmers with a view toward producing a viable commercial result. Tony is currently a Senior Software Engineer at NICTA where he is tasked with promoting and educating on functional programming for the benefit of all Australian software developers.

Tony takes a fastidious, principled approach to functional programming both when deployed in practice and when in a learning environment to ensure maximum yield from the effort. Tony believes that exploring principles and the following consequences provides a rewarding experience for all involved.