# Another way to initialize a hash but with less typing. The hash size is printed to show that the hash is new.
puts "\n02 Alternative Initialization\n\n"
h = {}
puts h.size

# The following hash is initialized and then all the keys are printed.
puts "\n03 Hash Keys\n\n"
h = {:line_1 => "3030 Ruby Way", :city => "Colorado Springs", :state => "CO", :zip => 80808}
h.each_key {|key| puts key}

# Using the above hash, the values are printed instead.
puts "\n04 Hash Values\n\n"
h.each_value {|value| puts value}

# Using the above hash, the city value is found and printed.
puts "\n05 Grabbing Specific Values\n\n"
puts "City = " + h[:city]

# Using the above hash, the line_1 key and value is deleted.
puts "\n06 Deletion\n\n"
h.delete :line_1
puts h.inspect

# Using the above hash and a new hash (h2), we merge both into one and then print the result.
puts "\n07 Addition/Merging\n\n"
h2 = {:created_at => Time.now}
h.merge! h2
puts h.inspect

0

02 Alternative Initialization

0

03 Hash Keys

line_1
city
state
zip

04 Hash Values

3030 Ruby Way
Colorado Springs
CO
80808

05 Grabbing Specific Values

City = Colorado Springs

06 Deletion

{:city=>"Colorado Springs", :state=>"CO", :zip=>80808}

07 Addition/Merging

{:city=>"Colorado Springs", :state=>"CO", :zip=>80808, :created_at=>Sun Feb 22 11:25:24 -0700 2009}

08 Clearing