about_hashes

# From ruby koans (http://rubykoans.com) - specifically about_hashes.rb
# Specifically def test_default_value_is_the_same_object
# Line 93
# This would be how I would run it in irb

hash = Hash.new([])
hash[:one] << "uno"
hash[:two] << "dos"
hash[:one] # => ["uno", "dos"]
hash[:two] # => ["uno", "dos"]
hash[:three] # => ["uno", "dos"]

newHash = Hash.new
newHash[:one] << "uno" # NoMethodError : undefined method '<<' for nil:NilClass