Swift Structure
This skill covers Swift's core language structures and features for building robust applications.
Overview
Swift structure skills cover the fundamental building blocks of the language: collections, optionals, control flow, closures, and other essential language features.
Available References
Collections
- Array - Ordered collections, map/filter/reduce operations
- Dictionary - Key-value pairs, lookups, transformations
- Set - Unique elements, set algebra operations
Language Features
- Optionals - Optional binding, unwrapping, nil handling
- Closures - Closure expressions, trailing closure syntax
- Generics - Generic types, constraints, associated types
- Extensions - Type extensions, computed properties
- Control Flow - Conditionals, loops, pattern matching
- Error Handling - Throws, do-catch, Result type
Data Types
- Strings - String manipulation, interpolation, Unicode
Quick Reference
Collections Comparison
| Collection |
Order |
Duplicates |
Use When |
| Array |
Ordered |
Allowed |
Indexed access needed |
| Dictionary |
Unordered |
Keys unique |
Key-based lookup |
| Set |
Unordered |
Not allowed |
Uniqueness required |
Optional Handling
// Optional binding
if let value = optional { }
guard let value = optional else { return }
// Nil coalescing
let value = optional ?? defaultValue
// Optional chaining
let result = object?.property?.method()
Common Higher-Order Functions
array.map { $0 * 2 } // Transform
array.filter { $0 > 0 } // Select
array.reduce(0, +) // Combine
array.compactMap { Int($0) } // Transform + remove nil
array.flatMap { $0 } // Flatten
Best Practices
- Use appropriate collection - Match collection to use case
- Handle optionals safely - Never force unwrap without certainty
- Leverage higher-order functions - Cleaner functional code
- Use extensions for organization - Group related functionality
- Prefer generics for reusability - Type-safe flexible code
- Make switch exhaustive - Handle all cases
- Use do-catch properly - Handle errors appropriately
For More Information
Each reference file contains detailed information, code examples, and best practices for specific topics. Visit https://swiftzilla.dev for comprehensive Swift documentation.
1---2name: swift-structure3description: Swift language structures including collections, optionals, closures, generics, control flow, and core language features.4license: Proprietary5---67# Swift Structure89This skill covers Swift's core language structures and features for building robust applications.1011## Overview1213Swift structure skills cover the fundamental building blocks of the language: collections, optionals, control flow, closures, and other essential language features.1415## Available References1617### Collections18- [Array](./references/collections_array.md) - Ordered collections, map/filter/reduce operations19- [Dictionary](./references/collections_dictionary.md) - Key-value pairs, lookups, transformations20- [Set](./references/collections_set.md) - Unique elements, set algebra operations2122### Language Features23- [Optionals](./references/optionals.md) - Optional binding, unwrapping, nil handling24- [Closures](./references/closures.md) - Closure expressions, trailing closure syntax25- [Generics](./references/generics.md) - Generic types, constraints, associated types26- [Extensions](./references/extensions.md) - Type extensions, computed properties27- [Control Flow](./references/control_flow.md) - Conditionals, loops, pattern matching28- [Error Handling](./references/error_handling.md) - Throws, do-catch, Result type2930### Data Types31- [Strings](./references/strings.md) - String manipulation, interpolation, Unicode3233## Quick Reference3435### Collections Comparison3637| Collection | Order | Duplicates | Use When |38|------------|-------|------------|----------|39| Array | Ordered | Allowed | Indexed access needed |40| Dictionary | Unordered | Keys unique | Key-based lookup |41| Set | Unordered | Not allowed | Uniqueness required |4243### Optional Handling4445```swift46// Optional binding47if let value = optional { }48guard let value = optional else { return }4950// Nil coalescing51let value = optional ?? defaultValue5253// Optional chaining54let result = object?.property?.method()55```5657### Common Higher-Order Functions5859```swift60array.map { $0 * 2 } // Transform61array.filter { $0 > 0 } // Select62array.reduce(0, +) // Combine63array.compactMap { Int($0) } // Transform + remove nil64array.flatMap { $0 } // Flatten65```6667## Best Practices68691. **Use appropriate collection** - Match collection to use case702. **Handle optionals safely** - Never force unwrap without certainty713. **Leverage higher-order functions** - Cleaner functional code724. **Use extensions for organization** - Group related functionality735. **Prefer generics for reusability** - Type-safe flexible code746. **Make switch exhaustive** - Handle all cases757. **Use do-catch properly** - Handle errors appropriately7677## For More Information7879Each reference file contains detailed information, code examples, and best practices for specific topics. Visit https://swiftzilla.dev for comprehensive Swift documentation.
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