Tutorial by Examples: am

Cofree Identity ~~ Stream

Given data Identity a = Identity a we have data Cofree Identity a = a :< Identity (Cofree Identity a) which is isomorphic to data Stream a = Stream a (Stream a)

Haskell Language • Common functors as the base of cofree comonads

Cofree (Writer w) ~~ WriterT w Stream

Given data Writer w a = Writer w a we have data Cofree (Writer w) a = a :< (w, Cofree (Writer w) a) which is equivalent to data Stream (w,a) = Stream (w,a) (Stream (w,a)) which can properly be written as WriterT w Stream with data WriterT w m a = WriterT (m (w,a))

Haskell Language • Common functors as the base of cofree comonads

B) Dynamic content's size :

The size of the content will change depending on the added elements that exceed the content limits in both axes (horizontal and vertical) that can be seen by moving through the view. import javafx.scene.control.ScrollPane; //Import the ScrollPane import javafx.scene.control.ScrollPane.ScrollBar...

javafx • ScrollPane

Sample server code

constexpr const size_t addressSize = sizeof(sockaddr_in); constexpr const uint16_t defaultPort = 80; // The port you want to use int serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); sockaddr_in serverAddress, clientAddress; memset(&serverAddress, 0, addressSize); serverAddress....

sockets • C++ Sockets

New Java SE 7 programming language features

Binary Literals: The integral types (byte, short, int, and long) can also be expressed using the binary number system. To specify a binary literal, add the prefix 0b or 0B to the number. Strings in switch Statements: You can use a String object in the expression of a switch statement The try-wit...

Java Language • Java SE 7 Features

New Java SE 8 programming language features

Lambda Expressions, a new language feature, has been introduced in this release. They enable you to treat functionality as a method argument, or code as data. Lambda expressions let you express instances of single-method interfaces (referred to as functional interfaces) more compactly. Method r...

Java Language • Java SE 8 Features

Custom Camera Control - Mouse-based Sliding

Here's an example of a custom camera controller. This reads the position of the mouse within the client window, and then slides the camera around as if it were following the mouse on the window. index.html <html> <head> <title>Three.js Custom Mouse Camera Control Ex...

three.js • Camera Controls in Three.js

Using Packages to create classes with the same name

First Test.class: package foo.bar public class Test { } Also Test.class in another package package foo.bar.baz public class Test { } The above is fine because the two classes exist in different packages.

Java Language • Packages

Objective-C Example

First declare a property like this in the ViewController @property (nonatomic) UIRefreshControl *refreshControl; Later in the viewDidLoad() set up the refreshControl as given below: self.refreshControl = [[UIRefreshControl alloc]init]; [self.tableView addSubview:self.refreshControl]; [self.re...

iOS • UIRefreshControl TableView

Sending Downstream Messages using Postman

To do this in Postman, you simply have to set the following: Set request type to POST In the Headers, set the following: Content-Type = application/json Authorization = < Your FCM Server Key > (See your Firebase Console's Cloud Messaging Tab) Set the payload parameters in the Body...

firebase-cloud-messaging • Firebase Cloud Messaging

Examining the Structure of an Expression using Visitor

Define a new visitor class by overriding some of the methods of ExpressionVisitor: class PrintingVisitor : ExpressionVisitor { protected override Expression VisitConstant(ConstantExpression node) { Console.WriteLine("Constant: {0}", node); return base.VisitConstant(...

C# Language • Expression Trees

Parsing a hierarchical record name using a regular expression

Using a regular expression, parse a record name that might be hierarchical. The expression looks for the final colon in the name. It returns what follows the colon, or the entire name if none: regexp_substr( {name} , '[^:]*$' )

netsuite • Exploiting formula columns in saved searches

Complex, real-world-like example

The following example combines several of the techniques covered here. It puts a hyperlink in a custom formatted column which, when clicked, opens the sales order record associated with a row. The hyperlink is designed to open the record in a new window or tab when clicked, and to display a tooltip ...

netsuite • Exploiting formula columns in saved searches

High Order Functions(Function as Parameter)

A higher-order function, as opposed to a first-order function, can have one of three forms: One or more of its parameters is a function, and it returns some value. It returns a function, but none of its parameters is a function. Both of the above: One or more of its parameters is a fu...

Scala Language • Higher Order Function

SWIFT Example

let frame = CGRect(x: 0, y: 100, width: 320, height: 10) let slider = UISlider(frame: frame) slider.addTarget(self, action: #selector(sliderAction), for: .valueChanged) slider.backgroundColor = .clear slider.minimumValue = 0.0 slider.maximumValue = 50.0 //sending a NO/False would updat...

iOS • UISlider

SWIFT Example

navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white, NSFontAttributeName:UIFont(name: "HelveticaNeue-CondensedBold", size: 17)!,] navigationController?.navigationBar.tintColor = .white navigationController?.navigationBar.barTintColor =...

iOS • Navigation Bar

Examble based on SDL2 control version

If you have a cmake module . You can create a folder called in to store all config files. For example,you have a project called FOO, you can create a FOO_config.h.in file like: //=================================================================================== // CMake configuration file, base...

cmake • Configure file

Bindings libraries may rename methods and interfaces

Not everything in a bindings library will have the same name in C# as it does in Java. In C#, interface names start with "I", but Java has no such convention. When you import a Java library, an interface named SomeInterface will become ISomeInterface. Similarly, Java doesn't have propert...

Xamarin.Android • Bindings

Turn a std::tuple into function parameters

A std::tuple<T...> can be used to pass multiple values around. For example, it could be used to store a sequence of parameters into some form of a queue. When processing such a tuple its elements need to be turned into function call arguments: #include <array> #include <iostream>...

C++ • std::integer_sequence

Create a parameter pack consisting of integers

std::integer_sequence itself is about holding a sequence of integers which can be turned into a parameter pack. Its primary value is the possibility to create "factory" class templates creating these sequences: #include <iostream> #include <initializer_list> #include <uti...

C++ • std::integer_sequence