2014-03-05.rb

2014-03-05_01.rb

str = "Alice" # => "Alice"

2014-03-05_02.rb

name = "Alice"
str = "I am #{name}!\n" # => I am Alice!\n

2014-03-05_03.rb

str = 'Alice'

2014-03-05_04.rb

name = "Alice"
str = 'I am #{name}!\n' # => I'm #{name}!\\n

2014-03-05_05.rb

alice = %!Alice! # => "Alice"
cheshire_cat = %Q[Cheshire Cat] # => "Cheshire Cat"
white_rabbit = %q[White Rabbit] # => "White Rabbit"

2014-03-05_06.rb

queen_of_hearts = %Q*Queen of Hearts* # => "Queen of Hearts"

2014-03-05_07.rb

"Alice found a bottle".gsub(/^(.+) found/, '\1 picked up')
  # => "Alice picked up a bottle"

2014-03-05_08.rb

"Alice found a bottle".gsub(/^(.+) found/, "\\1 picked up")
  # => "Alice picked up a bottle"