Swift

Async Concurrency

Bridging Callbacks With withCheckedContinuation
Mid
Concurrent Fetches With async let
Mid
Concurrent URL Fetch With withTaskGroup
Senior
Actor-Based Image Cache
Senior
Generic Async Retry With Backoff
Senior
Thread-Safe Generic Actor Cache
Senior
Fix a Data Race Under Strict Concurrency
Senior
Cancellable Background Task With Cleanup
Senior
Bounded Concurrency Task Limiter
Senior
Actor-Based ImageCache
Senior
Thread-Safe Generic Sendable Container
Senior
Parallel Profile Fetch With TaskGroup
Senior

Property Wrappers

@Clamped Property Wrapper
Junior
@Trimmed Property Wrapper
Junior
@Capitalized Property Wrapper
Junior
@Validated Property Wrapper
Mid
Codable @UserDefault Property Wrapper
Mid
@ValidatedEmail Property Wrapper
Mid
Type-Safe UserDefaults Wrapper
Mid

Generics Collections

Generic Stack With mutating Methods
Junior
Generic exists(_:) Array Extension
Junior
Generic Sort by Runtime KeyPath
Mid
Zip Two Results Into a Tuple
Mid
Custom MyResult Enum With map and flatMap
Mid
Generic LRU Cache With Eviction
Senior
Copy-on-Write Wrapper Struct
Senior
Type-Erased Wrapper for an Associatedtype
Senior
Copy-on-Write Generic Linked List
Senior

Dependency Injection Plugins

Mockable FileStorage Protocol
Mid
Plugin Protocol and Sequential PluginManager
Mid
Generic KeyPath Validator
Mid
Composable Generic Filter Pipeline
Mid
Type-Safe DIContainer With Generics
Senior
Type-Safe DI Container With Property Wrappers
Senior

Async Streams Timing

Search Bar Request Debouncer
Mid
Bridge a Callback API with AsyncStream
Mid
Debouncer With Task and Task.sleep
Senior
Custom TimerSequence With AsyncSequence
Senior
Debounced AsyncStream Wrapper
Senior

Sequences Functional Pipelines

Transaction Pipeline With map, compactMap, reduce
Junior
Custom compactMap Array Extension
Junior
Custom Sequence With Iterator
Mid
Lazy Fibonacci Sequence Type
Mid
Lazy Transforming Sequence Wrapper
Mid
Generic Memoize Higher-Order Function
Mid
Lazy Paginated Collection Type
Senior

Result Builders Dsls

AttributedStringBuilder Result Builder DSL
Senior
@HTMLBuilder Result Builder DSL
Senior
@dynamicMemberLookup JSON Wrapper
Senior
Style DSL With @resultBuilder
Senior
Type-Safe API Request DSL With @resultBuilder
Senior

Memory Management Arc

Fix a Closure Retain Cycle
Mid
Fix Parent/Child Retain Cycle
Mid
Weak Reference Array Wrapper
Mid
Weak MulticastDelegate<T>
Senior

Networking Pagination

Generic Decodable Network Client
Mid
Paginating AsyncSequence Wrapper
Senior

Codable Json

Decode Legacy snake_case JSON
Mid
Custom init(from:) for Mismatched JSON
Mid
Variadic Function With Type Dispatch
Mid
Custom encode(to:) With CodingKeys
Mid
Decode Result Into Codable Model
Senior
Polymorphic JSON Decoder With Custom Decoding
Senior

Caching State Management

MainActor ViewModel State Machine
Mid
Generic Cache With Time-Based Expiry
Mid
Generic LazyValue Wrapper
Mid
Undo/Redo Manager With Value Semantics
Senior

Protocols Operators

Custom Infix Power Operator
Junior
Manual Equatable and Hashable on Identity
Junior
Custom Subscript With Get and Set
Junior
Conform a Struct to Comparable
Junior
Throwing Function With Custom Error
Junior
Protocol Default Method With Override
Junior
Conform to CustomStringConvertible
Junior
Recursive Indirect Enum Expression Evaluator
Mid
Opaque vs Existential Return Types
Senior

Swift

Async Concurrency

Bridging Callbacks With withCheckedContinuation

Concurrent Fetches With async let

Concurrent URL Fetch With withTaskGroup

Actor-Based Image Cache

Generic Async Retry With Backoff

Thread-Safe Generic Actor Cache

Fix a Data Race Under Strict Concurrency

Cancellable Background Task With Cleanup

Bounded Concurrency Task Limiter

Actor-Based ImageCache

Thread-Safe Generic Sendable Container

Parallel Profile Fetch With TaskGroup

Property Wrappers

@Clamped Property Wrapper

@Trimmed Property Wrapper

@Capitalized Property Wrapper

@Validated Property Wrapper

Codable @UserDefault Property Wrapper

@ValidatedEmail Property Wrapper

Type-Safe UserDefaults Wrapper

Generics Collections

Generic Stack With mutating Methods

Generic exists(_:) Array Extension

Generic Sort by Runtime KeyPath

Zip Two Results Into a Tuple

Custom MyResult Enum With map and flatMap

Generic LRU Cache With Eviction

Copy-on-Write Wrapper Struct

Type-Erased Wrapper for an Associatedtype

Copy-on-Write Generic Linked List

Dependency Injection Plugins

Mockable FileStorage Protocol

Plugin Protocol and Sequential PluginManager

Generic KeyPath Validator

Composable Generic Filter Pipeline

Type-Safe DIContainer With Generics

Type-Safe DI Container With Property Wrappers

Async Streams Timing

Search Bar Request Debouncer

Bridge a Callback API with AsyncStream

Debouncer With Task and Task.sleep

Custom TimerSequence With AsyncSequence

Debounced AsyncStream Wrapper

Sequences Functional Pipelines

Transaction Pipeline With map, compactMap, reduce

Custom compactMap Array Extension

Custom Sequence With Iterator

Lazy Fibonacci Sequence Type

Lazy Transforming Sequence Wrapper

Generic Memoize Higher-Order Function

Lazy Paginated Collection Type

Result Builders Dsls

AttributedStringBuilder Result Builder DSL

@HTMLBuilder Result Builder DSL

@dynamicMemberLookup JSON Wrapper

Style DSL With @resultBuilder

Type-Safe API Request DSL With @resultBuilder

Memory Management Arc

Fix a Closure Retain Cycle

Fix Parent/Child Retain Cycle

Weak Reference Array Wrapper

Weak MulticastDelegate<T>

Networking Pagination

Generic Decodable Network Client

Paginating AsyncSequence Wrapper

Codable Json

Decode Legacy snake_case JSON

Custom init(from:) for Mismatched JSON

Variadic Function With Type Dispatch

Custom encode(to:) With CodingKeys

Decode Result Into Codable Model

Polymorphic JSON Decoder With Custom Decoding

Caching State Management

MainActor ViewModel State Machine

Generic Cache With Time-Based Expiry

Generic LazyValue Wrapper

Undo/Redo Manager With Value Semantics

Protocols Operators