Tutorial by Examples: int

What is a metaclass? In Python, everything is an object: integers, strings, lists, even functions and classes themselves are objects. And every object is an instance of a class. To check the class of an object x, one can call type(x), so: >>> type(5) <type 'int'> >>> typ...

Template Literals act like strings with special features. They are enclosed by by the back-tick `` and can be spanned across multiple lines. Template Literals can contain embedded expressions too. These expressions are indicated by a $ sign and curly braces {} //A single line Template Literal v...

User controls are made for reusability across ASP.NET pages, similar to master pages. Instead of sharing base page layout, user controls share group of HTML/ASP.NET built-in server controls or a specific form layout, e.g. comment submission or guest notes. A user control can contain both HTML contr...

CakePHP 3.x has the ability to bake controllers, models, views and other framework defined objects. Note : If you have had some experience with the Laravel framework, the artisan component is similar to bake. The bake application is located in bin folder; the following are some of the availabl...

Sometimes a build combines multiple source directories, each of which is their own 'project'. For instance, you might have a build structure like this: projectName/ build.sbt project/ src/ main/ ... test/ ... core/ src/ main/ ... test/ ... webapp/ src/ main/ ... test/ ... In t...

Creates a single Point. This will be a geometry or geography point depending on the class used. ParameterDetailLat or XIs a float expression representing the x-coordinate of the Point being generatedLong or YIs a float expression representing the y-coordinate of the Point being generatedStringWell ...

AlchemyLanguage's Targeted Sentiment feature can search your content for target phrases and return sentiment information for each result. This example requires AlchemyLanguage service credentials and Node.js Use a command-line interface to install the Watson Developer Cloud Node.js SDK: $...

A value_ptr is a smart pointer that behaves like a value. When copied, it copies its contents. When created, it creates its contents. // Like std::default_delete: template<class T> struct default_copier { // a copier must handle a null T const* in and return null: T* operator()(T co...

// this function add custom interval (5 minutes) to the $schedules function five_minutes_interval( $schedules ) { $schedules['five_minutes'] = array( 'interval' => 60 * 5, 'display' => '5 minutes'; ); return $schedules; } // add a custom in...

Pointers can be dereferenced by adding an asterisk * before a pointer. package main import ( "fmt" ) type Person struct { Name string } func main() { c := new(Person) // returns pointer c.Name = "Catherine" fmt.Println(c.Name) // prints: Cathe...

Classes implement an interface to meet the interface's contract. For example, a C# class may implement IDisposable, public class Resource : IDisposable { private MustBeDisposed internalResource; public Resource() { internalResource = new MustBeDisposed(); } ...

Slices are pointers to arrays, with the length of the segment, and its capacity. They behave as pointers, and assigning their value to another slice, will assign the memory address. To copy a slice value to another, use the built-in copy function: func copy(dst, src []Type) int (returns the amount o...

To construct a query, we need to represent it as a CFDictionary. You may also use NSDictionary in Objective-C or Dictionary in Swift and cast to CFDictionary. We need a class key: Swift var dict = [String : AnyObject]() dict[kSecClass as String] = kSecClassGenericPassword Next, we can specify...

As usual, we first need a CFDictionary to represent the item we want to update. This must contain all of the old values for the item, including the old private data. Then it takes a CFDictionary of any attributes or the data itself that you would like to change. So first, let's construct a class ke...

The Oracle Java Tutorials summarize Web Start as follows: Java Web Start software provides the power to launch full-featured applications with a single click. Users can download and launch applications, such as a complete spreadsheet program or an Internet chat client, without going through lengt...

Functions are an important part of Julia programming. They can be defined directly within modules, in which case the functions are referred to as top-level. But functions can also be defined within other functions. Such functions are called "closures". Closures capture the variables in th...

Prerequisites Have a strong grasp of a programming language such as Python, C, C++, Ruby, or any of the other languages out there. Have your favorite code editor or IDE installed (one such example is VSCode) Stay motivated. Constructing a compiler is not easy, so keep pushing; it's worth the ef...

Introduced in iOS 9, all endpoints must adhere to the HTTPS specification. Any endpoints not using SSL will fail with a warning in the console log. To your application it will appear that the internet connection failed. To configure exceptions: Place the following in your Info.plist file: Allow...

When you join two tables, SQL Server query optimizer (QO) can choose different types of joins that will be used in query: HASH join LOOP join MERGE join QO will explore plans and choose the optimal operator for joining tables. However, if you are sure that you know what would be the optimal ...

When you use GROUP BY clause, SQL Server query optimizer (QO) can choose different types of grouping operators: HASH Aggregate that creates hash-map for grouping entries Stream Aggregate that works well with pre-ordered inputs You can explicitly require that QO picks one or another aggregate ...