HackerRank in Swift - StdIn (http://mgrebenets.github.io/hackerrank/2015/03/15/hackerrank-in-swift---io/)

HackerRank-StdIn.swift

import Foundation

// MARK: Standard Input

/// Reads a line from standard input
///:returns: string form stdin
public func getLine() -> String {
    var buf = String()
    var c = getchar()
    // 10 is ascii code for newline
    while c != EOF && c != 10 {
        buf.append(UnicodeScalar(UInt32(c)))
        c = getchar()
    }
    return buf
}

public func readLn<T>() -> T {
    if (T.self as? String.Type != nil) {
        return getLine()
    } else if (T.self as? Int.Type != nil) {
        return getLine().toInt()!
    } else if (T.self as? [String].Type != nil) {
        return getLine().componentsSeparatedByCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
    } else if (T.self as? [Int].Type != nil) {
        let words: [String] = readLn()
        return words.map { $0.toInt()! }
    } else {
        return getLine()
    }
}