Ruby5 #558

https://ruby5.codeschool.com/episodes/600-episode-558-june-12th-2015

• Regular Extremism
  • advanced regular expression features
• Environment Variables
  • Every process has its own set of environment variables
  • A process gets its environment variables from its parent
  • Children can’t set their parents’ environment variables
• Functional Programming in Ruby
  • Monoids, Homomorphism, Functors, Monads
• Hash Default Values
  • Hash.new { |hash, key| hash[key] = fizz_and_or_bang(key) }
• Ruby Queries into SQL Statements
  • “20,000 Leagues Under ActiveRecord” in his Barcelona Ruby Conference talk
• Dependency Injection
  • some techniques used to help dry up code when using dependency injection
  • Using default arguments
    • def initialize(input:, parser: Parser.new, gateway: Gateway.new)

♫ Stereolab - Miss Modular

by SoundHound