Handling Optionals
We discuss many considerations and techniques for working with optionals.
Episode 93 · Mar 23
Swift, the Language
Swift is a complex language. While much of the more advanced features and oddities stay out of sight in everyday iOS development, studying these aspects provides many learning opportunities. This collection covers some of the lesser known aspects of the Swift languague.
14 Episodes · 4h30min
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Practicing with Pointers
We use Swift's pointer APIs to read a text file and split it into lines without using Swift's collection and string types.
Episode 92 · Mar 16
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Swift String vs. NSString
We look at how to work with ranges in a mixed Swift String/NSString environment.
Episode 80 · Dec 15, 2017
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String Parsing Performance
We benchmark the CSV parsing code from the previous episode and refactor it to become an order of magnitude faster.
Episode 79 · Dec 8, 2017
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Swift Strings and Substrings
We write a simple CSV parser as an example demonstrating how to work with Swift's String and Substring types.
Episode 78 · Dec 1, 2017
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Auto Layout with Key Paths
We clean up our layout code by introducing helper functions that leverage Swift's key paths.
Episode 75 · Nov 10, 2017
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Type-Safe File Paths with Phantom Types
Brandon Kase joins us to show how Swift's type system can be leveraged to check file paths at compile time.
Episode 71 · Oct 13, 2017
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Deleting Code with Swift 4
Swift 4's new features lets us delete code we've written in previous episodes.
Episode 52 · Jun 2, 2017
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Combined Class and Protocol Requirements
We look at multiple ways to create variables that have a class type but also conform to a protocol.
Episode 46 · Apr 21, 2017
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Mutating Untyped Dictionaries
Mutating a nested untyped dictionary can be a challenge. To solve it we discuss the mutability of value types and the concept of l-values.
Episode 31 · Jan 6, 2017
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Protocols & Class Hierarchies
We refactor a class hierarchy using a protocol and discuss the differences between both approaches.
Episode 29 · Dec 16, 2016
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Structs and Mutation
We can change structs by mutation, functional chaining, and inout parameters. We discuss how they differ at the call site and why they’re all equivalent.
Episode 21 · Oct 21, 2016
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Understanding Value Type Performance
We use copy-on-write to write an efficient struct wrapper around NSMutableData and discuss how the standard library uses the same approach.
Episode 20 · Oct 14, 2016