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Pattern matching is strong typing. It just doesn't assert on a type alone -- it also asserts on the shape of the data itself. Example:

    def handle_data(%{
      customer: %{
        date_of_birth: %NaiveDateTime{} = dob,
        account_balance: %Decimal{} = balance,
        name: name,
        count_purchases: purchases
      }
    }) when is_binary(name) and is_integer(count_purchases) do
    # work with the data here
    end
^ This both asserts on a particular data structure (a map with a "customer" key containing at least those four attributes) and asserts on the types of some of the attributes. I find it pretty handy and practical.

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But I concede that strong+static typing eliminates a class of bugs preliminarily. That is unequivocally true.




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