jeksys

extension UIImageView {
    func setImage(from url: URL, withPlaceholder placeholder: UIImage? = nil) {
        self.image = placeholder
        URLSession.shared.dataTask(with: url) { (data, _, _)
            if let data = data {
                let image = UIImage(data: data)
                DispatchQueue.main.async {
                    self.image = image
                }
            }

jeksys

ssh-add -K ~/.ssh/id_rsa

http://stackoverflow.com/questions/22021378/source-tree-ssh-public-key-denied

jeksys

find . -path ./Pods -prune -o -name "*.swift" -print0 ! -name "/Pods" | xargs -0 wc -l

jeksys

//: Playground - noun: a place where people can play
// playing with dates

import Foundation

let date = Date()
let myLocale = Locale(identifier: "en_CA")

//: ### Setting an application-wide `TimeZone`
//: Notice how we use if-let in case the abbreviation is wrong. It will fallback to the default timezone in that case.

jeksys

private protocol _Optional {
    func unwrappedString() -> String
}

extension Optional: _Optional {
    fileprivate func unwrappedString() -> String {
        switch self {
        case .some(let wrapped as _Optional): return wrapped.unwrappedString()
        case .some(let wrapped): return String(describing: wrapped)
        case .none: return String(describing: self)

jeksys

extension NSData {
    
    func hexadecimal() -> String {
        var string = ""
        var byte: UInt8 = 0
        
        for i in 0 ..< length {
            getBytes(&byte, range: NSMakeRange(i, 1))
            string += String(format: "%02x", byte)
        }

jeksys

private protocol _Optional {
    func unwrappedString() -> String
}

extension Optional: _Optional {
    private func unwrappedString() -> String {
        switch self {
        case .Some(let wrapped as _Optional): return wrapped.unwrappedString()
        case .Some(let wrapped): return String(wrapped)
        case .None: return String(self)

jeksys

 a:  AM/PM
 A:	0~86399999 (Millisecond of Day)
 
 c/cc:	1~7 (Day of Week)
 ccc:	Sun/Mon/Tue/Wed/Thu/Fri/Sat
 cccc:	Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
 
 d:	1~31 (0 padded Day of Month)
 D:	1~366 (0 padded Day of Year) 
 

jeksys

let text = [UInt8]("hello!!!".utf8)
let cipher = [UInt8]("good".utf8)

var encrypted = [UInt8]()

// encrypt bytes
for t in enumerate(text) {
    encrypted.append(t.element ^ cipher[t.index%cipher.count])
}

jeksys

extension UIColor {
   convenience init(red: Int, green: Int, blue: Int) {
       assert(red >= 0 && red <= 255, "Invalid red component")
       assert(green >= 0 && green <= 255, "Invalid green component")
       assert(blue >= 0 && blue <= 255, "Invalid blue component")

       self.init(red: CGFloat(red) / 255.0, green: CGFloat(green) / 255.0, blue: CGFloat(blue) / 255.0, alpha: 1.0)
   }

   convenience init(netHex:Int) {