ExtOptional

Handful of functions, operators and properties that will help you work with Optional types.

Usage

Call require() to require Optional values to be non-nil, or throws fatalError with optionally given hint for debugging purposes:

let gitURL: URL? = URL(string: "https://github.com/Smitters/OptionalExtensions")
let request = URLRequest(url: gitURL.require(hint: "Invalid URL"))

Call unwrap(default: value) to return the contained value or a default:

let daysInMonth: Int? = nil
let daysCount = daysInMonth.unwrap(default: 31) // returns 31

Property isNone returns true if the Optional is nil:

let x: String? = nil
let r = x.isNone // r == true

Property isSome returns true if the Optional is .some:

let x: String? = "foo"
let r = x.isSome // r == true

Property stringRepresentation ensures that the text you set never ever includes that annoying additional “Optional(…)”:

let x: String? = "String"
let y: Int? = 31
let z: String? = nil

print("\(x) \(y) \(z)") // Optional("String") Optional(31) nil
print("\(x.stringRepresentation) \(y.stringRepresentation) \(z.stringRepresentation)") // String 31

Swift 3 Removes Optional Comparison Operators, but you can achieve same behaviour adding ? symbol to Swift’s standart comparison operator:

let x: Int? = 43
let y: Int? = 5
let z: Int? = nil

x >=? y // true
x >? z // true
z >? x // false
y <? x // true
x <=? 43 // true
x <=? y //false

let array: [Int?] = [2, 4, nil, 1, 5, nil, 3]
let sortedArray = array.sorted(by: >?) // [5, 4, 3, 2, 1, nil, nil]

Installation

CocoaPods:

Add pod "ExtOptional" to your Podfile.

Manual:

Clone the repo and drag the file OptionalExtensions.swift into your Xcode project.

Help, feedback or suggestions?

• Open an issue if you need help, if you found a bug, or if you want to discuss a feature request.
• Open a PR if you want to make some change to ExtOptional.
• Contact @smetankin93 on Twitter for discussions, news & announcements about new pods.