Updating Maps in Elixir

recipe-updating-maps

# A map in Elixir is a key => value data structure
thomas = %{first_name: "Thomas", age: 38, job_title: "Director of Awesome"} 

# There are multiple ways to update a Map in Elixir like
 
# put/3 - https://hexdocs.pm/elixir/Map.html#put/3
thomas = Map.put(thomas, :age, 39)
%{first_name: "Thomas", age: 39, job_title: "Director of Awesome"}

# merge/2 - https://hexdocs.pm/elixir/Map.html#merge/2
thomas = Map.merge(thomas, %{age: 39})
%{first_name: "Thomas", age: 39, job_title: "Director of Awesome"} 
 
# put_in/3 - https://hexdocs.pm/elixir/Kernel.html#put_in/3
thomas = put_in(thomas, [:age], 39)
%{first_name: "Thomas", age: 39, job_title: "Director of Awesome"} 
 
# One of may favorites is 
thomas = %{thomas | age: 39}
# just be sure if you use this way to update the map that they keys already exist in the map you are updating otherwise you will get an error