1: HelloWorld

Javascript to Elm

Why this show now?

• I have gotten a taste of functional programming, and really like it, but Haskell is rough. Map, reduce, filter, slice.
• I Need that extra little push to keep at it, so by producing this show, I’ve added a little bit of outside pressure to keep me on track.
• The New Rustacean inspiration
• Webassembly is coming
• FrontEnd Masters
• Lin Clark
• webpack mozilla

So what is the podcast about?

• Learning ELM as I learn ELM, each episode will focus on a particular part or topic of the language. We’ll start at the beginning together and slowly work up to more advanced topics as we go.
• Show notes and exercises
• Possible community interviews and resources
• I like ELM Town, and would really like more podcast about ELM, rust, web assembly, and other cutting edge shows. If you know of any please drop me a message.

What is ELM

• Elm compiles to JavaScript, so trying out Elm is easy.
• Current version is 0.18.0
• Quick History:
  • created by Evan Czaplicki as his 2012 Thesis.
  • ELM Town podcast
• Unlike hand-written JavaScript, Elm code does not produce runtime exceptions in practice. Instead, Elm uses type inference to detect problems during compilation and give friendly hints.
• Enforced Semantic Versioning. No more surprises in PATCH releases!
  • SemVer x.y.z
    • x stands for major version, breaking changes expected
    • y stands for minor version, NO breaking changes
    • z stands for patch, tiny update
• Top Level Features
  • Immutability
  • Static types
  • Module System
  • Interoperability with HTML, CSS, and JS
  • Limits: does not have higher-kinder types, and thus cannot provide generic abstractions for many common operations, like map, apply, and fold. They are modules List.map, Dict.map
• Installing Elm
  • elm-repl — play with Elm expressions
  • elm-reactor — get a project going quickly
  • elm-make — compile Elm code directly
  • elm-package — download packages