Swift gist for medium article explaining optional + extensions

Optional Extensions.swift

extension Optional where Wrapped == String {
    var valueOrEmpty: String {
        guard let unwrapped = self else {
            return ""
        }
        return unwrapped
    }
}


let val: String? = "Hello"
//...
print(val.valueOrEmpty)


let booleanValue1 = Optional(true)! && Optional(false)!
//let booleanValue1 = Optional(nil)! && Optional(false)! // this generates an error

extension Optional where Wrapped == Bool {
    var valueOrFalse: Bool {
        guard let unwrapped = self else {
            return false
        }
        return unwrapped
    }
}

let optionalBool: Bool? = nil
let booleanValue2 = optionalBool.valueOrFalse && Optional(true).valueOrFalse