Type aliases in Kotlin allow you to provide alternative names for existing types. This is particularly useful for shortening long type names, or for providing more semantic meaning to existing types.
For example, instead of using ‘String’ you could create a type alias called ‘UserId’ that provides more information about the expected usage of that type.
'typealias UserId = String'
You can then substitute ‘UserId’ where you would otherwise use ‘String’. To the compiler, they both are treated the same.
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Categories: Learning Kotlin