hello.rb

# print prints, puts adds a break line?
puts 'Hello world'

# for loop!
[1, 2, 3].each { |e| puts e }

# classes is over
class Person
  def initialize(fname, lname)
    @fname = fname
    @lname = lname
  end
  def to_s
    "Person: #@fname #@lname"
  end
end
person = Person.new('Juan', 'de la Cruz')
puts person

# string interpolation
puts "#{Time.now}"

# read file
file = File.new('hello.rb')
puts file.read

# read first line from file IO
lines = IO.readlines('hello.rb')
puts lines[0]

# print file IO for each
IO.foreach('hello.rb') { |line| puts line }

# convert strings to array, escape with space
STATES = %w(hello world lorem\ ipsum)
puts STATES