Changes in Ruby 1.9

ruby_19_hash.rb

#Hash becomes more compatible
#Do you know you can write hash in ruby like you do in other languages.

hs = {first: 1, second: 2, third: 3, fourth: 4}
# => {:first=>1, :second=>2, :third=>3, :fourth=>4}

hs.class
# => Hash

ruby_19_hash_1.rb

#In Ruby 1.9 hash became ordered. Don't you believe try it yourself

hs = {:first=>1, :second=>2, :third=>3, :fourth=>4}

#OUTPUT in Ruby 1.9
# => {:first=>1, :second=>2, :third=>3, :fourth=>4}
#ain't they ordered hah

#OUTPUT in Ruby 1.8
#=> {:fourth=>4, :first=>1, :second=>2, :third=>3}