smitters/optionalextensions

Some extensions for Optional type

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.