Swift Types & FunctionsLesson 25Free preview

Tuples & Type Aliases

This lesson is part of Swift · All levels

Summary

This lesson is about Tuple and Typealias in Swift. Tuple groups several values into one compound value while without the need to define a new struct, it is ideal for a function that returns many values. Typealias gives a new alias that makes more sense for the data type that exists.

Key points

Tuple combines several heterogeneous-type values into one compact entity
The tuple element can be labeled by name or accessed via a position index number (0, 1,...)
The keyword 'typealias' gives an alternative name to the complex data type
Very commonly used to simplify the signature closure or callback handler name

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