Initial data commit

Task/Enumerations/Elixir/enumerations-2.elixir

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+fruits = [{:apple, 1}, {:banana, 2}, {:cherry, 3}]  # Keyword list
+fruits = [apple: 1, banana: 2, cherry: 3]           # Above-mentioned different notation
+fruits[:apple]                                      #=> 1
+Keyword.has_key?(fruits, :banana)                   #=> true
+
+fruits = %{:apple=>1, :banana=>2, :cherry=>3}       # Map
+fruits = %{apple: 1, banana: 2, cherry: 3}          # Above-mentioned different notation
+fruits[:apple]                                      #=> 1
+fruits.apple                                        #=> 1 (Only When the key is Atom)
+Map.has_key?(fruits, :banana)                       #=> true