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var a:Int?
let b = 2
var output:Int?

//a is nil here
output = a ?? b

print("Value of Output is \(output!)")
//a is assigned value of b

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//
//  SendMail.swift
//  SendEmail with attachment
//
//  Created by Spaceghost on 3/09/16.
//  Copyright (c) 2016 Spaceghost. All rights reserved.
//

import UIKit
import MessageUI

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import UIKit
import XCPlayground

class ViewController: UIViewController {
    func action() { print("Bing!") }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .whiteColor()
        

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import sys
from SimpleHTTPServer import SimpleHTTPRequestHandler
import BaseHTTPServer


def test(HandlerClass=SimpleHTTPRequestHandler,
         ServerClass=BaseHTTPServer.HTTPServer):

    protocol = "HTTP/1.0"
    host = ''

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git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote

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import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import java.io.ByteArrayOutputStream;

/**
 * Sketch Project Studio
 * Created by Angga on 12/04/2016 14.27.
 */
public class AppHelper {    

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import Foundation

enum RutError: ErrorType{
  
  case InvalidRut(message : String)
  
}
class FormValidator: NSObject {
    static func validateRut(value : String) throws ->String {
    //clean rut

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import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.View;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class EmptyRecyclerView extends RecyclerView {
  @Nullable View emptyView;

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package jieqoo.android.KASS.test.tasks;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import jieqoo.android.models.RESTListener;
import jieqoo.android.models.RESTResponse;
import jieqoo.android.tasks.FetchRESTResponseTask;
import jieqoo.android.util.Configuration;
import android.test.InstrumentationTestCase;

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package net.kristopherjohnson.util;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

/**
 * Methods for dealing with timestamps