In Swift, we can create generic methods that can work with any data type by using placeholders called type parameters
. We define a method with these type parameters and can then use them to write code that works with any data type.
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In the above example, T
is our type parameter which stands for any data type. We can replace T
with any type we want to use in the method.
We can also add type constraints
to our type parameters to limit what types of data the method can work with. For example, if we only want our method to work with types that conform to a specific protocol, we can define a type constraint like this:
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In this case, we're saying that T
must conform to the MyProtocol
protocol in order to be used with this method.
Using generics can make our code more flexible and reusable because we're not tied to working with one specific data type. Instead, we can write a single method that can work with a wide range of data types.
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