Real-world iOS engineering, explained clearly.
Value semantics vs reference semantics, static vs dynamic dispatch, and why Apple recommends structs by default. The article that changes how you think about Swift.
Raw values, associated values, recursive enums with indirect, and how the compiler picks the minimal memory representation.
Closure expressions, value capturing, capture lists, @escaping vs non-escaping, and why closures are reference types that live on the heap.
Learn to read Flame Graphs, audit async tasks with Swift Tasks, and push Processor Trace to its limits with a real CLI project that uses Swift Concurrency intensively.
Parameters, labels, inout, function types and functions as values. The gateway to closures and functional programming.
Learn to diagnose performance issues as a scientific process. Master Weight vs Self-Weight, Charge/Prune/Flatten, and scale profiling with xctrace.
if/else, exhaustive switch with pattern matching, guard as a philosophy, and how the compiler optimizes your decisions into jump tables.
Viscerally understand what happens when your code runs. Visualize malloc, free, reference counting, and retain cycles with interactive components.
Unicode scalars, grapheme clusters, why string[0] doesn't exist in Swift, and how Substring shares memory with the original String.
Discover how Swift's collections work inside: when to use each one, their algorithmic complexity, and the elegance of copy-on-write.
