Tutorial by Examples: ti

let mySwitch: UISwitch = { view.addSubview($0) $0.addTarget(self, action: "action", forControlEvents: .TouchUpInside) return $0 }(UISwitch())

@IBOutlet weak var title: UILabel! { didSet { label.textColor = UIColor.redColor() label.font = UIFont.systemFontOfSize(20) label.backgroundColor = UIColor.blueColor() } } It's also possible to both set a value and initialize it: private var loginButton = UIButton() { ...

This is similar in syntax to the example that initializes using positional constants, but requires the Then extension from https://github.com/devxoul/Then (attached below). let label = UILabel().then { $0.textAlignment = .Center $0.textColor = UIColor.blackColor( $0.text = "Hell...

//Swift let storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle()) //Objective-c UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];

//Swift let initialScreen = storyboard.instantiateInitialViewController() //Objective-c UIViewController *initailScreen = [storyboard instantiateInitialViewController];

let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100)) view.backgroundColor = UIColor.orange self.view.addSubview(view) UIView.animate(withDuration: 0.75, delay: 0.5, options: .curveEaseIn, animations: { //This will cause view to go from (0,0) to // (self.view.frame.origi...

Assuming the call to your web application's login handler looks like this: https://somepage.com/ajax/login.ashx?username=admin&password=123 Now in login.ashx, you read these values: strUserName = getHttpsRequestParameterString("username"); strPassword = getHttpsRequestParameterSt...

Intent: Define an interface for creating an object, but let sub classes decide which class to instantiate. Factory Method lets a class defer instantiation to sub classes. UML diagram: Product: It defines an interface of the objects the Factory method creates. ConcreteProduct: Implements Produc...

The Builder pattern allows you to create an instance of a class with many optional variables in an easy to read way. Consider the following code: public class Computer { public GraphicsCard graphicsCard; public Monitor[] monitors; public Processor processor; public Memory[] r...

BigInteger supports the binary logic operations that are available to Number types as well. As with all operations they are implemented by calling a method. Binary Or: BigInteger val1 = new BigInteger("10"); BigInteger val2 = new BigInteger("9"); val1.or(val2); Output:...

Classes provide a way of creating your own types within the .NET framework. Within a class definition you may include the following: Fields Properties Methods Constructors Events To declare a class you use the following syntax: Public Class Vehicle End Class Other .NET types can...

Converting between encodings is easy with C++11 and most compilers are able to deal with it in a cross-platform manner through <codecvt> and <locale> headers. #include <iostream> #include <codecvt> #include <locale> #include <string> using namespace std; i...

You can show a Help Button at title-bar of a Form. To do so, you should: Set HelpButton property of form to true. Set MinimizeBox and MaximizeBox to false. Then a help button will appear on title-bar of Form: Also when you click on Help button, the cursor will be changed to a ? cursor: ...

SELECT product, SUM(quantity) AS "Total quantity" FROM order_details GROUP BY product;

Assume a table of employees in which each row is an employee who has a name, a department, and a salary. SELECT department, MIN(salary) AS "Lowest salary" FROM employees GROUP BY department; This would tell you which department contains the employee with the lowest salary, and what t...

std::ostringstream can be used to convert any streamable type to a string representation, by inserting the object into a std::ostringstream object (with the stream insertion operator <<) and then converting the whole std::ostringstream to a std::string. For int for instance: #include <sst...

SELECT * FROM Cars WHERE status IN ( 'Waiting', 'Working' ) This is semantically equivalent to SELECT * FROM Cars WHERE ( status = 'Waiting' OR status = 'Working' ) i.e. value IN ( <value list> ) is a shorthand for disjunction (logical OR).

Exceptions represent programmer-level bugs like trying to access an array element that doesn’t exist. Errors are user-level issues like trying load a file that doesn’t exist. Because errors are expected during the normal execution of a program. Example: NSArray *inventory = @[@"Sam"...

To create a simple variable and assign it to a value or string use the SET command: SET var=10 Here, the code declares a new variable var with a value of 10. By default all variables are stored internally as strings; this means that the value 10 is no different to foo1234 or Hello, World! Notes...

Before we start... In terms of application layers your ViewModel is a class containing all the business logic and rules making the app do what it should according to the requirements. It's also important to make it as much independent as possible reducing references to UI, data layer, native featur...