Swift Unwrap Function

Swift Unwrap Function.swift

/*
 * Returns the default value whenever the primary value is nil
 * Otherwise returns the primary value
 */
func unwrap<T>(primaryValue: T?, defaultValue: T) -> T {
    if let value = primaryValue { return value }
    else { return defaultValue }
}

// Examples

// Fancy swift-style optional integers
let x: Int? = 2
let y: Int? = nil

// C-style non-nilable integers
let oldX = unwrap(x, 0) // -> 2
let oldY = unwrap(y, 0) // -> 0