Tutorial by Examples: g

All fragments should have an empty constructor (i.e. a constructor method having no input arguments). Therefore, in order to pass your data to the Fragment being created, you should use the setArguments() method. This methods gets a bundle, which you store your data in, and stores the Bundle in the ...

CSS Getter The .css() getter function can be applied to every DOM element on the page like the following: // Rendered width in px as a string. ex: `150px` // Notice the `as a string` designation - if you require a true integer, // refer to `$.width()` method $("body").css("width...

Dim Value As Integer An Integer is a signed 16 bit data type. It can store integer numbers in the range of -32,768 to 32,767 and attempting to store a value outside of that range will result in runtime error 6: Overflow. Integers are stored in memory as little-endian values with negatives repres...

Dim Value As Long A Long is a signed 32 bit data type. It can store integer numbers in the range of -2,147,483,648 to 2,147,483,647 and attempting to store a value outside of that range will result in runtime error 6: Overflow. Longs are stored in memory as little-endian values with negatives re...

Dim Value As Single A Single is a signed 32 bit floating point data type. It is stored internally using a little-endian IEEE 754 memory layout. As such, there is not a fixed range of values that can be represented by the data type - what is limited is the precision of value stored. A Single can...

A String represents a sequence of characters, and comes in two flavors: Variable length Dim Value As String A variable length String allows appending and truncation and is stored in memory as a COM BSTR. This consists of a 4 byte unsigned integer that stores the length of the String in bytes fo...

Dim Value As LongLong A LongLong is a signed 64 bit data type and is only available in 64 bit applications. It is not available in 32 bit applications running on 64 bit operating systems. It can store integer values in the range of -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 and attem...

Dim Value As LongPtr The LongPtr was introduced into VBA in order to support 64 bit platforms. On a 32 bit system, it is treated as a Long and on 64 bit systems it is treated as a LongLong. It's primary use is in providing a portable way to store and pass pointers on both architectures (See Chan...

To define a new middleware we have to create the middleware class: class AuthenticationMiddleware { //this method will execute when the middleware will be triggered public function handle ( $request, Closure $next ) { if ( ! Auth::user() ) { return red...

Callbacks are often used to provide error handling. This is a form of control flow branching, where some instructions are executed only when an error occurs: const expected = true; function compare(actual, success, failure) { if (actual === expected) { success(); } else { failure...

If you want to delete rows (or columns) in a loop, you should always loop starting from the end of range and move back in every step. In case of using the code: Dim i As Long With Workbooks("Book1").Worksheets("Sheet1") For i = 1 To 4 If IsEmpty(.Cells(i, 1)) Then...

#Modules to use use Cwd 'abs_path'; use Win32::OLE; use Win32::OLE qw(in with); use Win32::OLE::Const "Microsoft Excel"; $Win32::OLE::Warn = 3; #Need to use absolute path for Excel files my $excel_file = abs_path("$Excel_path") or die "Error: the file $Excel_path ha...

In ui-router a state can hold multiple views, each with his own controller and a template .state('dashboard', { name: 'dashboard', url: '/dashboard', views: { "view1": { templateUrl: "path/to/view1.html", controller: "...

You can resolve data into your state when you transition into it, usually it's useful when the state needs to use that data, or to resolve into a state when some provided input needs to be authenticated. When you define your states, you will need to provide a map of values to be resolved into the ....

The syntax for filtering for NULL (i.e. the absence of a value) in WHERE blocks is slightly different than filtering for specific values. SELECT * FROM Employees WHERE ManagerId IS NULL ; SELECT * FROM Employees WHERE ManagerId IS NOT NULL ; Note that because NULL is not equal to anything, not ...

Setting a field to NULL works exactly like with any other value: UPDATE Employees SET ManagerId = NULL WHERE Id = 4

For example inserting an employee with no phone number and no manager into the Employees example table: INSERT INTO Employees (Id, FName, LName, PhoneNumber, ManagerId, DepartmentId, Salary, HireDate) VALUES (5, 'Jane', 'Doe', NULL, NULL, 2, 800, '2016-07-22') ;

A cross-origin request must be sent including the Origin header. This indicates from where the request originated. For example, a cross-origin request from http://example.com to http://example.org would look like this: GET /cors HTTP/1.1 Host: example.org Origin: example.com The server will us...

The response to a CORS request must include an Access-Control-Allow-Origin header, which dictates what origins are allowed to use the CORS resource. This header can take one of three values: An origin. Doing this permits requests from that origin only. The character *. This permits requests from...

Allowing user credentials or the user's session to be sent with a CORS request allows the server to persist user data across CORS requests. This is useful if the server needs to check if the user is logged in before providing data (for example, only performing an action if a user is logged in - this...