maxjacobson

lvar = 1
defined?(lvar) # => "local-variable"
defined?(no_lvar)

$gvar = 1
defined?($gvar) # => "global-variable"
defined?($no_gvar) # => nil

CONST = 1
defined?(CONST) # => "constant"

maxjacobson

Will:

#!/usr/bin/env ruby

class Fountain
  def self.x=(x)
    @x = x
  end

maxjacobson

require "English"

def some_method
  # I didn't know it would still be set here
  $ERROR_INFO # => #<RuntimeError: hell>
end

begin
  raise "hell"
rescue

maxjacobson

            is everything working?
            no                                                     yes
                                                            you're done!
            are your tests passing?                         great job! open a PR
        yes                   no

    write a failing test,    make your tests pass,
    go back to beginning     go back to beginning

maxjacobson

# usage:
# ruby trie.rb chatter

word = ARGV.first || ["chatter", "helio", "wonder", "gosli"].sample

class Node
  def add(chars)
    return if chars.empty?

    char = chars.shift

maxjacobson

require 'readline'

def reminder
  puts "vi editing mode? #{Readline.vi_editing_mode?}"
  puts "emacs editing mode? #{Readline.emacs_editing_mode?}"

  puts "Try:
  writing something!
  going up and down in history
  going forward and backwards some characters

maxjacobson

#!/usr/bin/env ruby

require 'json'
require 'yaml'

def simple_structure(orig)
  case orig
  when Hash
    simple = {}
    orig.each do |key, value|

maxjacobson

trap('INT') do
  print("\n")
  exit
end

output = Enumerator.new do |yielder|
  chars = "▁▂▃▄▅▆█".split("")
  chars = chars + chars.reverse
  nums = (0..(chars.length - 1)).to_a
  loop do

maxjacobson

require 'github_api' # gem install github_api

require 'readline'
require 'fileutils'

FileUtils.touch("./safe")
username = Readline.readline("Enter your github username: ")
pw = Readline.readline("Enter your regular github password: ")
one_time_password = Readline.readline("Enter your one time password: ")

maxjacobson

require 'nokogiri'

failing = Nokogiri::HTML(File.read(ARGV.first))

def node_to_just_classes(node)
  {
    'name' => node.name,
    'classes' => (node.attributes["class"]&.value&.split(" ")&.compact || []),
    'children' =>  node.children.map { |child| node_to_just_classes(child) }
  }