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