Google Code Jam stdin reader - Swift version

CodeJamReader.swift

import Foundation

func readInput() {
    let numberOfCases = Int(readLine() ?? "0")!
    
    for _case in 0..<numberOfCases {
    	guard let currentLine = readLine() as String! else {
    		return
    	}
    	let lineValues = getIntegersOf(line: currentLine, separatedBy: " ")
    	let n = lineValues[0]
    	let m = lineValues[1]
      print("Case #\(_case): \(n + m) \(n * m)");
    }
}

func getIntegersOf(line: String, separatedBy separator: String) -> [Int] {
	let stringArray = line.components(separatedBy: separator)
	// WARNING: if separator is " " and there's a space after the last number then stringArray contains empty string!
	return stringArray.map { Int($0)! }
}