Some fluent wrappers around the nil-coalescing operator and optionals in Swift

Optional+Fluent.swift

extension Optional {
    
    func or(_ backup: Wrapped) -> Wrapped {
        if let wrapped = self {
            return wrapped
        }
        return backup
    }
    
}

extension Optional where Wrapped: ExpressibleByArrayLiteral {
    
    func orEmpty() -> Wrapped {
        let emptyArray: Wrapped = []
        return or(emptyArray)
    }
    
}

let string: String? = nil
string.or("alternative").utf8.count // returns 11

let array: [String]? = nil
array.orEmpty().count // returns 0