String_controlFlow_tests.swift

// String operations
var test = "Marcos Pinto"

test.insert(" ", atIndex: test.startIndex.advancedBy(6))

test.insertContentsOf("Costa".characters, at: test.startIndex.advancedBy(7))

print(test)

test.removeAtIndex(test.startIndex)

print(test)

test.removeRange(test.startIndex...test.startIndex.advancedBy(5))

print(test)

print(test.hasPrefix(" Costa"))

print(test.hasSuffix("Pinto"))



// if let ...
let b: Int? = 1

if let a = b {
    print(a)
}



// switch clausules
let ages = (14, 15)

switch ages {
    case (_, 15): // whitecard (_)
        print("OK1")
    
    case (14, _):
        print("OK2")
    
    case (_, let y) where y > 10: // let, where
        print("OK3 \(y)")
        fallthrough
    
    default:
        print("default")
}



// labeled statements
mainFor: for i in 1...10 {
    subFor: for j in 1...10 {
        print("\(i) \(j)")

        if (i + j) % 3 == 0 {
            continue mainFor
        }
    }
}



// early exiting
func exitEarly() {
    return
    
        print("OK")
}

func exitEarly2(name: String?) {
    guard let n = name else {
        print("nil passed")
        return
    }
    print("name is \(n)")
}

exitEarly()
exitEarly2("Marcos")
exitEarly2(nil)



// platform availability
if #available(OSX 10.10, *) {
    print("OK")
}