01:49 - Erik Michaels-Ober Introduction

• Twitter
• GitHub
• Ruby Rogues Episode #127: Erik Michaels-Ober

02:07 - The Crystal Programming Language and Statically Typed Programming Languages

• Erik Michaels-Ober: An Introduction to Crystal @ PolyConf 15

06:54 - Type Inference

• Union Types
• Duck Typing
• Monkey Patching
• Sandi Metz Blog Post on the Wrong Abstraction

15:06 - Crystal vs Rust or Go

20:10 - Linting

• Rubocop

20:44 - Type Annotations and Perimeters

• Keyword Arguments

22:53 - The History of Crystal and its Development as a Language

• Crystal Docs
• Crystal GitHub Repo
• The Future of Crystal (Christmastime Blog Post)

24:41 - Annotation and Return Value

25:35 - Type Inferencing (Cont’d)

28:24 - Crystal REPL (ICR)

32:15 - Getting Involved with Crystal and the Development of the Language

• Crystal to_proc

40:08 - Threading and Concurrency

44:28 - Crystalshards

• Crystal Weekly

49:30 - Use Cases and Benchmarks

• Crystal Standard Library
• wc.cr

01:03:15 - Compile Errors

More on Crystal

• Erik Michaels-Ober: Crystal Programming Language @ RubyC 2015
• Interview for RubyC-2015 with Erik Michaels-Ober
• Built-in formatting tool Issue

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Special Guest: Erik Michaels-Ober.