Wes joins Mike for a special Coder. They share thoughts on the costs and benefits of Optionals in Swift, uncover Mike's secret love affair with F#, and debate the true value of serverless. Links:Mark's IoT FeedbackIOKit — The I/O Kit framework implements non-kernel access to I/O Kit objects (drivers and nubs) through the device-interface mechanism.Does iPad Pro (2018) support IOKit? — IOKit has included iOS support since 2.0Elixir — Elixir is a dynamic, functional language designed for building scalable and maintainable applications.Craft and deploy bulletproof embedded software in ElixirNervesHub — NervesHub helps you manage firmware updates for Nerves devices.Elixir Mix Podcast — A weekly discussion with Elixir developers.Optional - Swift Standard Library — A type that represents either a wrapped value or nil, the absence of a value.Swift optionals explained simplyF# Software Foundation — F# is a mature, open source, cross-platform, functional-first programming languageDatomic Ions — Ions let you develop applications for the cloud by deploying your code to a running Datomic cluster. Rich Hickey on Datomic Ions