Blog Topics: Swift Language

Beginner Swift

  1. Optionals explained simply - Why they exist, unwrapping safely
  2. if let vs guard let - When to use which
  3. Structs vs Classes - Value vs reference types
  4. Arrays, Sets, Dictionaries - Collection basics
  5. For loops and iterations - forEach, enumerated, indices
  6. Functions and closures intro - Syntax, trailing closures
  7. Enums with associated values - Powerful pattern matching
  8. Properties: stored vs computed - Getters, setters, didSet
  9. Access control basics - private, fileprivate, internal, public
  10. Error handling with try/catch - Throwing functions

Intermediate Swift

  1. Protocols explained - Conformance, default implementations
  2. Extensions: Adding functionality - Retroactive modeling
  3. Generics basics - Type parameters, constraints
  4. Closures deep dive - Capture lists, escaping, autoclosure
  5. map, filter, reduce explained - Functional patterns
  6. compactMap vs flatMap - When to use which
  7. Codable for JSON parsing - Encode, decode, custom keys
  8. Property wrappers basics - @propertyWrapper, projectedValue
  9. Lazy properties and sequences - Deferred evaluation
  10. Subscripts: Custom accessors - Array-like syntax for types

Advanced Swift

  1. Protocol-oriented programming - Composition over inheritance
  2. Generics: where clauses and associated types - Advanced constraints
  3. Opaque types (some) explained - When and why
  4. Result builders deep dive - Building DSLs
  5. Key paths and their uses - Dynamic member lookup
  6. Copy-on-write implementation - Performance optimization
  7. Memory management: ARC internals - Strong, weak, unowned
  8. Metatypes: .self and .Type - Runtime type access
  9. @dynamicCallable and @dynamicMemberLookup - Scripting language interop
  10. Unsafe Swift: Pointers and buffers - When you need raw performance

Swift Concurrency

  1. async/await basics - Simple async code
  2. Task and TaskGroup - Structured concurrency
  3. Actors explained - Data race prevention
  4. MainActor for UI updates - Thread safety
  5. AsyncSequence and AsyncStream - Async iteration
  6. Continuations: Bridging old APIs - withCheckedContinuation
  7. Sendable protocol - Safe data sharing
  8. Task cancellation done right - Cooperative cancellation
  9. Actor isolation explained - nonisolated, isolated parameters
  10. Global actors: Custom actors - Beyond MainActor

Swift 5.9/6.0 Features

  1. Macros in Swift - #stringify, custom macros
  2. if/switch expressions - Returning values
  3. Consume and borrowing - Ownership keywords
  4. Noncopyable types - ~Copyable structs
  5. Parameter packs - Variadic generics
  6. Typed throws - Specific error types
  7. Strict concurrency checking - Migration guide
  8. @retroactive conformance - Silencing warnings properly
  9. Observation framework - @Observable under the hood
  10. Swift Testing framework - #expect, @Test basics

High-Traffic Swift Searches

  1. “Cannot convert value of type” - Type mismatch fixes
  2. “Escaping closure captures mutating self” - Solutions
  3. “Protocol can only be used as a generic constraint” - any vs some
  4. String to Int conversion - Parsing safely
  5. Date formatting in Swift - DateFormatter, ISO8601
  6. Comparing optionals - Nil coalescing, equality
  7. Sorting arrays of objects - sorted(by:), Comparable
  8. Removing duplicates from array - Set, filter patterns
  9. Delay/sleep in Swift - Task.sleep, DispatchQueue
  10. Reading/writing files in Swift - FileManager basics

Patterns & Best Practices

  1. Dependency injection without frameworks - Protocol-based DI
  2. Builder pattern in Swift - Fluent interfaces
  3. Factory pattern with protocols - Flexible object creation
  4. Singleton: When it’s actually okay - And when it’s not
  5. Result type for error handling - Beyond throws
  6. Type erasure explained - AnyPublisher, AnySequence
  7. Phantom types for safety - Compile-time guarantees
  8. Never type and its uses - Impossible states
  9. ExpressibleBy protocols - Literal convertibles
  10. Custom operators: When to use - Readability considerations