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This demonstrates how to print each element of a Map val map = Map(1 -> "a", 2 -> "b") for (number <- map) println(number) // prints (1,a), (2,b) for ((key, value) <- map) println(value) // prints a, b This demonstrates how to print each element of a list val l...

Full example code included at the end Windows components for OpenGL WGL WGL (can be pronounced wiggle) stands for "Windows-GL", as in "an interface between Windows and OpenGL" - a set of functions from the Windows API to communicate with OpenGL. WGL functions have a wgl prefix...

var MyDict = new Dictionary<string,T>(StringComparison.InvariantCultureIgnoreCase)

The Scala compiler will automatically convert methods into function values for the purpose of passing them into higher-order functions. object MyObject { def mapMethod(input: Int): String = { int.toString } } Seq(1, 2, 3).map(MyObject.mapMethod) // Seq("1", "2", &...

using System.Runtime.InteropServices; class PInvokeExample { [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern uint MessageBox(IntPtr hWnd, String text, String caption, int options); public static void test() { MessageBox(IntPtr.Zero,...

Detailed instructions on getting domain-driven-design set up or installed.

In certain situations, data declarations can be performed inline. LOOP AT lt_sflight INTO DATA(ls_sflight). WRITE ls_sflight-carrid. ENDLOOP.

DATA begda TYPE sy-datum.

DATA: begda TYPE sy-datum, endda TYPE sy-datum.

The ToDictionary() LINQ method can be used to generate a Dictionary<TKey, TElement> collection based on a given IEnumerable<T> source. IEnumerable<User> users = GetUsers(); Dictionary<int, User> usersById = users.ToDictionary(x => x.Id); In this example, the single ar...

The long keyword is used to represent signed 64-bit integers. It is an alias for the System.Int64 datatype present in mscorlib.dll, which is implicitly referenced by every C# project when you create them. Any long variable can be declared both explicitly and implicitly: long long1 = 92233720368547...

Keyword used for unsigned 64-bit integers. It represents System.UInt64 data type found in mscorlib.dll which is implicitly referenced by every C# project when you create them. Range: 0 to 18,446,744,073,709,551,615 ulong veryLargeInt = 18446744073609451315; var anotherVeryLargeInt = 1544674406360...

Letters 3.0 let letters = CharacterSet.letters let phrase = "Test case" let range = phrase.rangeOfCharacter(from: letters) // range will be nil if no letters is found if let test = range { print("letters found") } else { print("letters not found") }...

The - symbol marks a type parameter as contravariant - here we say that "Handler is contravariant on A": trait Handler[-A] { def handle(a: A): Unit } A contravariant type parameter can be thought of as an "input" type. Marking A as contravariant asserts that Handler[X] &l...

Because collections are typically covariant in their element type*, a collection of a subtype may be passed where a super type is expected: trait Animal { def name: String } case class Dog(name: String) extends Animal object Animal { def printAnimalNames(animals: Seq[Animal]) = { anima...

The if construct (called a block IF statement in FORTRAN 77) is common across many programming languages. It conditionally executes one block of code when a logical expression is evaluated to true. [name:] IF (expr) THEN block [ELSE IF (expr) THEN [name] block] [ELSE [name] block] ...

Suppose you have a simple Customer model: class Customer(models.Model): first_name = models.CharField(max_length=255) last_name = models.CharField(max_length=255) is_premium = models.BooleanField(default=False) You register it in the Django admin and add search field by first_name...

In this example we aim to accomplish one of the most common tasks: I have a small DC motor laying around, how do I use my Arduino to control it? Easy, with PWM and serial communication, using the function analogWrite() and the Serial library. The basics Pulse Width Modulation or PWM for short is a...

private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = new Interceptor() { @Override public Response intercept(Interceptor.Chain chain) throws IOException { Response originalResponse = chain.proceed(chain.request()); return originalResponse.newBuilder() .header(&q...

This is an basic example on how to wire up and make an LED turn on/off when the pushbutton is pressed. /* Basic Digital Read * ------------------ * * turns on and off a light emitting diode(LED) connected to digital * pin 13, when pressing a pushbutton attached to pin 7. It illustrates...