swanson

# Add color coding based on Rails environment for safety

if defined? Rails
  banner = if Rails.env.production?
    "\e[41;97;1m #{Rails.env} \e[0m "
  else
    "\e[42;97;1m #{Rails.env} \e[0m "
  end

  # Build a custom prompt

jferris

apiVersion: v1
kind: ConfigMap
metadata:
  name: example
  namespace: default
data:
  APPLICATION_HOST: example.com
  LANG: en_US.UTF-8
  PIDFILE: /tmp/server.pid
  PORT: "3000"

jsimpson

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

Tables

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

Table alias

l3kn

fizz = ["","","Fizz"].lazy.cycle
buzz = ["","","","","Buzz"].lazy.cycle
numbers = (1..Float::INFINITY).lazy

fizzbuzz = numbers.zip(fizz,buzz).map do |n,f,b|
  (f.empty? && b.empty?) ? n.to_s : f + b
end

puts fizzbuzz.take(20).to_a

devnulled

// flatMap
// This code is equivalent to:
// option.flatMap(foo(_))
option match {
  case None => None
  case Some(x) => foo(x)
}

// flatten
// This code is equivalent to:

unnitallman

require 'active_record'

ActiveRecord::Base.logger = Logger.new(STDERR)
ActiveRecord::Base.colorize_logging = false

ActiveRecord::Base.establish_connection(
    :adapter => "sqlite3",
    :dbfile  => ":memory:"
)