lesson_1.rb

# Basic Ruby Primitives

# String
"Test String".upcase.split("S")                           # => ["TE", "T ", "TRING"]

# Array
a = [1, 2, 3]
a[0..1]                                                      # => [1, 2]

# Hash
h = Hash.new                                       # => {}
h.class                                            # => Hash
h.inspect                                          # => "{}"
h.object_id                                        # => 70255624059320
# or h = {} 

h = {}                                             # => {}
h.class                                            # => Hash
h.inspect                                          # => "{}"
h.object_id                                        # => 70255624057600

h = {
:name => "Test_name",
:type => 1,
:array => ["bob", 1, {}],
}
h                                                  # => {:name=>"Test_name", :type=>1, :array=>["bob", 1, {}]}
h[:array][0]                                       # => "bob"
h[:array][2]                                       # => {}