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Swift Dictionary

Swift Dictionary Index

[Setup] Swift Development Environment	Steps to set up an environment for installing and running Swift.
let / var / Type Inference	Declaring constants and variables with type inference.
Tuple / Named Tuple	Grouping multiple values together.
String.count / isEmpty / String Literals	Basic string operations.
String.uppercased() / lowercased() / capitalized	Converting between uppercase and lowercase.
String.hasPrefix() / hasSuffix() / contains()	String determination and checking.
String.replacingOccurrences() / trimmingCharacters()	Replacing and trimming strings.
String.split() / joined() / String Index	Splitting, joining, and index operations on strings.
Array.append() / insert() / remove()	Adding, inserting, and removing array elements.
Array.contains() / firstIndex() / lastIndex()	Searching and checking within an array.
Array.filter() / sorted() / sort()	Filtering and sorting an array.
Array.map() / compactMap() / flatMap()	Transforming array elements.
Array.reduce() / forEach() / enumerated()	Aggregating and enumerating an array.
Array.prefix() / suffix() / dropFirst() / dropLast()	Slicing and concatenating arrays.
Dictionary Basics / .keys / .values	Declaring and accessing a dictionary.
Dictionary.updateValue() / Removing Entries / mapValues()	Updating, deleting, and transforming a dictionary.
Set.insert() / remove() / contains()	Basic set operations.
Set.union() / intersection() / subtracting()	Set operations such as union and intersection.
switch / case / where / fallthrough	Conditional branching with pattern matching.
for-in / while / repeat-while	Basic loop constructs.
break / continue / return / labeled statement	Controlling loops and functions.
guard / guard let / guard var	Conditional checking with early return.
func / Argument Labels / Default Parameters	Defining functions and rules for arguments.
inout / Return Types / Multiple Return Values	Advanced use of inout parameters and return values.
Closures (Basics) / { } / in	Basic closure syntax.
Trailing Closures / Shorthand / $0	Writing closures concisely using trailing closure syntax.
@escaping / @autoclosure / Capture List	Advanced topics on closures.
Optional / ? / !	Basics of Optional (safely handling nil).
if let / guard let (Optional Binding)	Safely unwrapping an Optional.
Optional Chaining / map / flatMap (Optional)	Calling methods and transforming Optional values.
?? (Nil-Coalescing Operator)	Returning a default value when nil is encountered.
Type Casting — as / as? / as! / is	Checking and converting types.
enum Basics / case / switch	Defining and using enumerations.
enum RawValue (Int / String)	Enumerations with raw values.
enum Associated Values	Enumerations with associated values.
enum Methods / Properties / mutating	Adding methods to an enumeration.
struct Basics / Memberwise Initializer	Defining structs and characteristics of value types.
class Basics / init() / deinit()	Defining classes and characteristics of reference types.
Inheritance / override / final / super	Class inheritance and method overriding.
Stored Properties / Computed Properties / lazy	Types of properties and how to use them.
Failable Initializer / required init	Special initializers.
typealias / Type Alias	Giving a type an alias.
protocol Basics / Conformance	Defining and adopting protocols.
Protocol Default Implementations / Protocol Composition	Advanced use of protocols.
extension Basics / Adding Methods	Extending existing types.
extension + protocol / Default Implementations	Conforming to a protocol using an extension.
Codable / Encodable / Decodable	JSON encoding and decoding.
Comparable / Hashable / Equatable	Using standard protocols.
Generic Functions / Type Parameters	Writing generic functions independent of specific types.
Generic Types / where Clause	Generic structs, classes, and enums.
some / any / opaque type	Type abstraction syntax in Swift 5.7+.
Error / Defining Errors with enum	Defining custom errors.
throws / try / do-catch	Throwing and catching errors.
Result<Success, Failure>	Treating success and failure as values.
ARC / Strong References / Retain Cycles	How ARC works and patterns that cause retain cycles.
weak / unowned	Preventing retain cycles with weak and unowned references.
async / await Basics	Defining and calling asynchronous functions.
Task / TaskGroup / async let	Managing tasks and running them in parallel.
Actor / Preventing Data Races	Data protection with actors and usage of @MainActor.
Date / DateFormatter / Calendar	Manipulating dates and times.
URL / URLComponents / URLSession	Building URLs and making HTTP requests.
JSONDecoder / JSONEncoder	JSON decoding and encoding.
FileManager	File and directory operations.
UserDefaults	Persisting app settings and small data.
NotificationCenter	Event notification between objects.
Timer	Timer processing.

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