Tutorial by Examples: b

The &AUX keyword can be used to define local variables for the function. They are not parameters; the user cannot supply them. &AUX variables are seldomly used. You can always use LET instead, or some other way of defining local variables in the function body. &AUX variables have the a...

Functions always establish a block around the body. This block has the same name as the function name. This means you can use RETURN-FROM with this block name to return from the function and return values. You should avoid returning early whenever possible. (defun foobar (x y) (when (oddp x) ...

page = PAGE page.10 = TEXT page.10.value = HELLO WORLD Usually this typoScript snippets are added to Web >> Template >> Info/Modify >> setup This snippet opens a new PAGE object. Inside the PAGE object, the 10th entry is set to be a TEXT object. The value of thus TEXT object ...

A static member function is just like an ordinary C/C++ function, except with scope: It is inside a class, so it needs its name decorated with the class name; It has accessibility, with public, protected or private. So, if you have access to the static member function and decorate it correctl...

To access a member function of a class, you need to have a "handle" to the particular instance, as either the instance itself, or a pointer or reference to it. Given a class instance, you can point to various of its members with a pointer-to-member, IF you get the syntax correct! Of course...

To access a member of a class, you need to have a "handle" to the particular instance, as either the instance itself, or a pointer or reference to it. Given a class instance, you can point to various of its members with a pointer-to-member, IF you get the syntax correct! Of course, the poi...

A static member variable is just like an ordinary C/C++ variable, except with scope: It is inside a class, so it needs its name decorated with the class name; It has accessibility, with public, protected or private. So, if you have access to the static member variable and decorate it correctl...

If you are familiar with jQuery and Sizzle syntax, d3 selections should not be much different. d3 mimics the W3C Selectors API to make interacting with elements easier. For a basic example, to select all <p> and add a change to each of them: d3.selectAll('p') .attr('class','textClass') ...

The lubridate package provides convenient functions to format date and datetime objects from character strings. The functions are permutations of LetterElement to parseBase R equivalentyyear%y, %Ym (with y and d)month%m, %b, %h, %Bdday%d, %ehhour%H, %I%pm (with h and s)minute%Msseconds%S e.g. ymd(...

You can alternatively use an Object Declaration that contains the main function for a Kotlin program. package my.program object App { @JvmStatic fun main(args: Array<String>) { println("Hello World") } } The class name that you will run is the name of you...

Similar to using an Object Declaration, you can define the main function of a Kotlin program using a Companion Object of a class. package my.program class App { companion object { @JvmStatic fun main(args: Array<String>) { println("Hello World") ...

The <div> element usually has no specific semantic meaning by itself, simply representing a division, and is typically used for grouping and encapsulating other elements within an HTML document and separating those from other groups of content. As such, each <div> is best described by it...

C++11 In the header file: // widget.h #include <memory> // std::unique_ptr #include <experimental/propagate_const> class Widget { public: Widget(); ~Widget(); void DoSomething(); private: // the pImpl idiom is named after the typ...

This query will return all COLUMNS and their associated TABLES for a given column name. It is designed to show you what tables (unknown) contain a specified column (known) SELECT c.name AS ColName, t.name AS TableName FROM sys.columns c JOIN sys.tables t ON c.object_id = t.o...

Writes to the trace listeners in the Listeners collection when the application is compiled in debug configuration. public static void Main(string[] args) { Debug.WriteLine("Hello"); } In Visual Studio or Xamarin Studio this will appear in the Application Output window. This is d...

PropertyPossible Valuesdisplaygrid / inline-grid The CSS Grid is defined as a display property. It applies to a parent element and its immediate children only. Consider the following markup: <section class="container"> <div class="item1">item1</div> &lt...

/** * Parameters * * @param int $int * @param string $string * @param array $array * @param bool $bool */ function demo_param($int, $string, $array, $bool) { } /** * Parameters - Optional / Defaults * * @param int $int * @param string $string * @param ...

The border-radius property allows you to change the shape of the basic box model. Every corner of an element can have up to two values, for the vertical and horizontal radius of that corner (for a maximum of 8 values). The first set of values defines the horizontal radius. The optional second ...

The border-style property sets the style of an element's border. This property can have from one to four values (for every side of the element one value.) Examples: border-style: dotted; border-style: dotted solid double dashed; border-style can also have the values none and hidden. They ...

It is possible to limit the tests executed by manage.py test by specifying which modules should be discovered by the test runner: # Run only tests for the app names "app1" $ python manage.py test app1 # If you split the tests file into a module with several tests files for an app $ p...