Swift Optional extension to simplify conditional expresions in some cases.

Let's say we have the following code:

let optionalInt: Int? = ???
let description: String
if let amount = optionalInt {
    description = "\(amount) items"
} else {
    description = "no items"
}
print(description)

We can write the same code using IfLetSwift:

let description = optionalInt.ifLet { "\($0) items" } ?? "no items"
print(description)

So it provides a consise and readable expression.

Setup

CocoaPods

Make sure that you are using the latest CocoaPods version.

Add the following line to your podfile:

pod 'IfLetSwift'

Don't forget to update your pods and open the generated xcworkspace file:

$ pod install

You will also need to import the module in order to use the extension methods:

import IfLetSwift

Other

The library is actually a single file so you might simply copy Optional+IfLetSwift.swift to your project.

Usage

The library provides two extension methods that can be called on optional values.

• ifLet: Receives a closure that will be called only if the optional has a value, the closure is passed the actual value. Returns the value returned by the closure or nil.
• elseDo: Receives a closure with no arguments that is called only if the optional is nil. It is usually chained after ifLet

Please have a look at IfLetSwift.playground for samples on how to use these methods.

License

IfLetSwift is released under the MIT license. See LICENSE for details.