Set of Swift extensions for standard types and classes.

Contents

• ExSwift extensions

  • Array
    • Instance Methods
    • Class Methods
    • Operators
  • Int
    • Instance Methods
    • Class Methods
  • Float
    • Instance Methods
    • Class Methods
  • String
    • Properties
    • Instance Methods
    • Class Methods
    • Operators
  • Range
    • Instance Methods
    • Class Methods
    • Operators
  • Dictionary
    • Instance Methods
    • Operators
  • NSArray
    • Instance Methods
  • SequenceOf
    • Instance Methods
  • Double
    • Instance Methods
    • Class Methods

• Utilities

  • Class Methods

Extensions

Array

Examples in the Wiki

Instance Methods

Name	Signature
first	first () -> Element?
last	last () -> Element?
get	get (index: Int) -> Element?
remove	remove <U: Equatable> (element: U)
at	at (indexes: Int...) -> Array
take	take (n: Int) -> Array
takeWhile	takeWhile (condition: (Element) -> Bool) -> Array
takeFirst	takeFirst (condition: (Element) -> Bool) -> Element
tail	tail (n: Int) -> Array
skip	skip (n: Int) -> Array
skipWhile	skipWhile (condition: (Element) -> Bool) -> Array
contains	contains <T: Equatable> (item: T...) -> Bool
difference	difference <T: Equatable> (values: [T]...) -> [T]
intersection	intersection <U: Equatable> (values: [U]...) -> Array
union	union <U: Equatable> (values: [U]...) -> Array
unique	unique <T: Equatable> () -> [T]
indexOf	indexOf <T: Equatable> (item: T) -> Int?
indexOf	indexOf (condition: Element -> Bool) -> Int?
lastIndexOf	lastIndexOf <T: Equatable> (item: T) -> Int?
zip	zip (arrays: Array<Any>...) -> [[Any?]]
partition	partition (var n: Int, var step: Int? = nil) -> [Array] partition (var n: Int, var step: Int? = nil, pad: Element[]?) -> [Array]
partitionAll	partitionAll (var n: Int, var step: Int? = nil) -> [Array]
partitionBy	partitionBy <T: Equatable> (cond: (Element) -> T) -> [Array]
shuffle	shuffle ()
shuffled	shuffled () -> Array
sample (random)	sample (size n: Int = 1) -> [T]
max	max <T: Comparable> () -> T
min	min <T: Comparable> () -> T
each	each (call: (Element) -> ()) each (call: (Int, Element) -> ())
eachRight	eachRight (call: (Element) -> ()) eachRight (call: (Int, Element) -> ())
any	any (call: (Element) -> Bool) -> Bool
all	all (call: (Element) -> Bool) -> Bool
reject	reject (exclude: (Element -> Bool)) -> Array
pop	pop() -> Element
push	push(newElement: Element)
shift	shift() -> Element
unshift	unshift(newElement: Element)
insert	insert (newArray: Array, atIndex: Int)
groupBy	groupBy <U> (groupingFunction group: (Element) -> (U)) -> [U: Array]
countBy	countBy <U> (groupingFunction group: (Element) -> (U)) -> [U: Int]
countWhere	countWhere (test: (Element) -> Bool) -> Int
reduce	reduce (combine: (Element, Element) -> Element) -> Element?
reduceRight	reduceRight <U>(initial: U, combine: (U, Element) -> U) -> U
mapFilter	mapFilter <V> (mapFunction map: (Element) -> (V)?) -> [V]
implode	implode <C: ExtensibleCollection> (separator: C) -> C?
flatten	flatten <OutType> () -> [OutType]
flattenAny	flattenAny () -> [AnyObject]
sortBy	sortBy (isOrderedBefore: (T, T) -> Bool) -> [T]
toDictionary	toDictionary <U> (keySelector:(Element) -> U) -> [U: Element]

Class Methods

Name	Signatures
range	range <U: ForwardIndex> (range: Range<U>) -> Array<U>

Operators

Name	Signature	Function
-	- <T: Equatable> (first: Array<T>, second: Array<T>) -> Array<T>	Difference
-	- <T: Equatable> (first: Array<T>, second: T) -> Array<T>	Element removal
&	& <T: Equatable> (first: Array<T>, second: Array<T>) -> Array<T>	Intersection
|	| (first: Array, second: Array) -> Array	Union
* Int	* <ItemType> (array: ItemType[], n: Int) -> [ItemType]	Returns a new array built by concatenating int copies of self
* String	* (array: String[], separator: String) -> String	Equivalent to array.implode(String)
[x..y] [x...y]	subscript(range: Range<Int>) -> Array	Returns the sub-array from index x to index y
[x, y, ...]	subscript(first: Int, second: Int, rest: Int...) -> Array	Returns the items at x, y

Int

Examples in the Wiki

Instance Methods

Name	Signatures
times	times <T> (call: (Int) -> T) times <T> (call: () -> T) times (call: () -> ())
isEven	isEven () -> Bool
isOdd	idOdd () -> Bool
upTo	upTo (limit: Int, call: (Int) -> ())
downTo	downTo (limit: Int, call: (Int) -> ())
clamp	clamp (range: Range<Int>) -> Int clamp (min: Int, max: Int) -> Int
isIn	isIn (range: Range<Int>, strict: Bool = false) -> Bool
digits	digits () -> Array<Int>
abs	abs () -> Int
gcd	gcd (n: Int) -> Int
lcm	lcm (n: Int) -> Int

Class Methods

Name	Signatures
random	random(min: Int = 0, max: Int) -> Int

Float

Examples in the Wiki

Instance Methods

Name	Signature
abs	abs () -> Float
sqrt	sqrt () -> Float
round	round () -> Float
ceil	ceil () -> Float
floor	floor () -> Float

Class Methods

Name	Signatures
random	random(min: Float = 0, max: Float) -> Float

String

Examples in the Wiki

Properties

Name
length
capitalized

Instance Methods

Name	Signature
explode	explode (separator: Character) -> [String]
at	at (indexes: Int...) -> [String]
matches	matches (pattern: String, ignoreCase: Bool = false) -> [NSTextCheckingResult]?
insert	insert (index: Int, _ string: String) -> String
ltrimmed	ltrimmed () -> String
rtrimmed	rtrimmed () -> String
trimmed	trimmed () -> String

Class Methods

Name	Signature
random	func random (var length len: Int = 0, charset: String = "...") -> String

Operators

Name	Signature
[x]	subscript(index: Int) -> String?
[x..y] [x...y]	subscript(range: Range<Int>) -> String
[x, y, z]	subscript (indexes: Int...) -> [String]
S * n	* (first: String, second: Int) -> String
=~	=~ (string: String, pattern: String) -> Bool =~ (string: String, options: (pattern: String, ignoreCase: Bool)) -> Bool =~ (strings: [String], pattern: String) -> Bool =~ (strings: [String], options: (pattern: String, ignoreCase: Bool)) -> Bool
|~	|~ (string: String, pattern: String) -> Bool |~ (string: String, options: (pattern: String, ignoreCase: Bool)) -> Bool

Range

Examples in the Wiki

Instance Methods

Name	Signatures
times	times (call: (T) -> ()) times (call: () -> ())
each	each (call: (T) -> ())

Class Methods

Name	Signature
random	random (from: Int, to: Int) -> Range<Int>

Operators

Name	Signature	Function
=	== <U: ForwardIndex> (first: Range<U>, second: Range<U>) -> Bool	Compares 2 ranges

Dictionary

Examples in the Wiki

Instance Methods

Name	Signatures
difference	difference <V: Equatable> (dictionaries: [Key: V]...) -> [Key: V]
union	union (dictionaries: [Key: Value]...) -> [Key: Value]
intersection	intersection <K, V where K: Equatable, V: Equatable> (dictionaries: [K: V]...) -> [K: V]
has	has (key: Key) -> Bool
map	map <K, V> (mapFunction map: (Key, Value) -> (K, V)) -> [K: V]
mapFilter	mapFilter <K, V> (mapFunction map: (Key, Value) -> (K, V)?) -> [K: V]
mapValues	mapValues <V> (mapFunction map: (Key, Value) -> (V)) -> [Key: V]
mapFilterValues	mapFilterValues <V> (mapFunction map: (Key, Value) -> V?) -> [Key: V]
each	each(eachFunction each: (Key, Value) -> ())
filter	filter(testFunction test: (Key, Value) -> Bool) -> [Key: Value]
merge	merge (dictionaries: [Key: Value]...) -> [Key: Value]
shift	shift () -> (Key, Value)
groupBy	groupBy <T> (groupingFunction group: (Key, Value) -> (T)) -> [T: Array<Value>]
countBy	countBy <T> (groupingFunction group: (Key, Value) -> (T)) -> [T: Int]
countWhere	countWhere (test: (Key, Value) -> (Bool)) -> Int
any	any (test: (Key, Value) -> (Bool)) -> Bool
all	all (test: (Key, Value) -> (Bool)) -> Bool
reduce	reduce <U> (initial: U, combine: (U, Element) -> U) -> U
pick, at	pick (keys: [Key]) -> Dictionary pick (keys: Key...) -> Dictionary at (keys: Key...) -> Dictionary

Operators

Name	Signature	Function
-	- <K, V: Equatable> (first: Dictionary<K, V>, second: Dictionary<K, V>) -> Dictionary<K, V>	Difference
&	& <K, V: Equatable> (first: Dictionary<K, V>, second: Dictionary<K, V>) -> Dictionary<K, V>	Intersection
|	| (first: Dictionary, second: Dictionary) -> Dictionary	Union

NSArray

Examples in the Wiki

Instance Methods

Name	Signatures
cast	cast <OutType> () -> [OutType]
flatten	flatten <OutType> () -> [OutType]
flattenAny	flattenAny () -> [AnyObject]

SequenceOf

The following operations can be performed on sequences and are evaluated lazily. Each operation only takes the data it requires from the source sequence in order to return its result.

The Sequence protocol cannot be extended, hence the following are extensions to SequenceOf. They can be used as follows:

var source: Sequence = ...
var filteredSequence = SequenceOf(source).filter { ... }

Instance Methods

Name	Signatures
first	first () -> T?
any	any (call: (T) -> Bool) -> Bool
get	get (index: Int) -> T?
get	get (range: Range<Int>) -> SequenceOf<T>
indexOf	indexOf <U: Equatable> (item: U) -> Int?
filter	filter(include: (T) -> Bool) -> SequenceOf<T>
reject	reject (exclude: (T -> Bool)) -> SequenceOf<T>
skipWhile	skipWhile(condition:(T) -> Bool) -> SequenceOf<T>
skip	skip (n:Int) -> SequenceOf<T>
contains	contains<T:Equatable> (item: T) -> Bool
take	take (n:Int) -> SequenceOf<T>
takeWhile	takeWhile (condition:(T?) -> Bool) -> SequenceOf<T>

Double

Examples in the Wiki

Instance Methods

Name	Signature
abs	abs () -> Double
sqrt	sqrt () -> Double
round	round () -> Double
ceil	ceil () -> Double
floor	floor () -> Double

Class Methods

Name	Signatures
random	random(min: Double = 0, max: Double) -> Double

Utilities

Examples in the Wiki

Class Methods

Name	Signatures
after	after <P, T> (n: Int, function: P -> T) -> (P -> T?) func after <T> (n: Int, function: () -> T) -> (() -> T?)
once	once <P, T> (function: P -> T) -> (P -> T?) once <T> (call: Void -> T) -> (Void -> T?)
partial	partial <P, T> (function: (P...) -> T, _ parameters: P...) -> ((P...) -> T?)
bind	bind <P, T> (function: (P...) -> T, _ parameters: P...) -> (() -> T)
cached	cached <P, R> (function: (P...) -> R) -> ((P...) -> R) cached <P, R> (function: (P...) -> R, hash: ((P...) -> P)) -> ((P...) -> R)

To Do

• [X] Wiki
• [X] Xcode project for both iOS & OS X
• [X] Review code comments
• [ ] Example project
• [ ] Installation instructions
• [ ] Benchmark