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Book Overview & Buying
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Table Of Contents
Mastering Swift 6 - Seventh Edition
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Dynamic member lookup allows properties to be resolved at runtime, creating a cleaner interface for accessing data. By using the @dynamicMemberLookup attribute and implementing a dynamic member subscript, properties can be accessed as if they were regular properties, making our code more concise and easier to read. However, caution is advised, as invalid keys won't trigger compiler warnings, therefore it’s important to put validation within the code.
Key paths offer a type-safe, concise method to access and manipulate properties without using string literals, thereby reducing errors. Represented by the KeyPath type and defined with the \. syntax, key paths can be used in functions to get and set property values. They also work with higher-order functions like map and filter, enabling clean and easier to read operations on collections.
In the next chapter we will look at how to use Grand Central Dispatch.