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Featured Frontmatter Podcast Interview

Chris Penner

Chris Penner, Author of Optics By Example: Functional Lenses in Haskell

Chris Penner is the author of the Leanpub book Optics By Example: Functional Lenses in Haskell. In this interview, Leanpub co-founder Len Epp talks with Chris about his background, how he got into programming, how he specifically got into programming in Haskell, moving to work for a time in Berlin, why a monad in Haskell is like a "programmable semicolon", what "optics" are and a bit about their history, his book, and at the end, they talk a little bit about his experience as a self-published author.

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Featured Course

Learn To Test Like A Grumpy Programmer

The instructor has published 100% of this course.

Learn from one of the PHP community's most-recognized experts as he teaches you the building blocks for testing your PHP code.

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses! Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks. Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. It really is that easy.

Learn more about writing on Leanpub