Swift

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Coding
Theory
Quiz

    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