Tutorial by Examples: w

How to implement FirebaseRealTime database in android application. Following is the steps for do it. First install firebase sdk, If you dont know how to install then following is the URL for help. Install Firebase SDK After thet register your project in firbase console, URL of the firbas...

By using the Grid.RowSpan and Grid.ColumnSpan attached properties, children of a Grid can span multiple rows or columns. In the following example the second TextBlock will span the second and third column of the Grid. <Grid> <Grid.ColumnDefinitions> <ColumnDefinition/&...

The row heigths or column widths of multiple Grids can be synchronized by setting a common SharedSizeGroup on the rows or columns to synchronize. Then a parent control somewhere up in the tree above the Grids needs to have the attached property Grid.IsSharedSizeScope set to True. <StackPanel Gri...

public ActionResult Index() { // Renders a view as a Web page. return View(); } Action methods typically return a result that is known as an action result. The ActionResult class is the base class for all action results. The ActionInvoker decide which type of action result to return ...

public ActionResult PopulateFoods() { IEnumerable<Food> foodList = GetAll(); // Renders a partial view, which defines a section of a view that can be rendered inside another view. return PartialView("_foodTable", foodVms);; } Action methods typically retur...

Xamarins built in gesture recognizers provide only very basic touch handling. E.g. there is no way to get the position of a touching finger. MR.Gestures is a component which adds 14 different touch handling events. The position of the touching fingers is part of the EventArgs passed to all MR.Gestu...

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> /root/element[@foobar] and will return the <element foobar="hello_world" /> element.

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> The following XPath expression: /root/element[@foobar = 'hello_world'] will return the <element foobar="hello_world&quo...

Let's say you don't want the fields houseNum and street in the address field of the final populated doc, use the populate() as follows, Person.findOne({_id: req.params.id}) .populate('address', '-houseNum -street') // note the `-` symbol .exec(function(err, person) { // do somet...

If you only want the fields houseNum and street in the address field in the final populated doc, use the populate() function as follows in the above two methods, Person.findOne({_id: req.params.id}) .populate('address', 'houseNum street') .exec(function(err, person) { // do somet...

If the built in attributes are not sufficient to validate your model data, then you can place your validation logic in a class derived from ValidationAttribute. In this example only odd numbers are valid values for a model member. Custom Validation Attribute public class OddNumberAttribute : Valid...

When sending a notification to an iOS device, you must set priority: "high" for it to wake up. Otherwise, the notification will not be received while the phone is asleep. Sets the priority of the message. Valid values are "normal" and "high." On iOS, these correspond...

OpenCL is low level api so it must be implemented in "C space" first. For that, one needs to download header files from Khronos' site. My hardware is AMD and capable of version 1.2, downloading opencl.h cl_platform.h cl.h cl_ext.h cl_egl.h cl_dx9_media_sharing.h cl_d3d10.h c...

Today, performance is one of the most important metrics we need to evaluate when developing a web service/Application. Keeping customers engaged is critical to any product and for this reason, it is extremely important to improve the performances and reduce page load times. When running a web serve...

Installing typescript, typings and webpack globally npm install -g typescript typings webpack Installing loaders and linking typescript npm install --save-dev ts-loader source-map-loader npm link typescript Linking TypeScript allows ts-loader to use your global installation of TypeScript inste...

1.Download font-awesome from here. 2.Copy the font-awesome directory into your project. 3.In the of your html, reference the location to your font-awesome.min.css. <link rel="stylesheet" href="path/to/bootstrap/css/bootstrap.min.css"> <link rel="stylesheet&quot...

Downloading Prerequisites: We provide native 64-bit binaries for Windows 7 and above. A 64-bit version of Windows is required. Download the ZIP archive and unpack it in a directory of your choice. The Windows port of RethinkDB is a recent addition and hasn't received as much tuning as the Linux a...

C source file gcc -Wall -Wextra -o main main.c C++ source file g++ -Wall -Wextra -Wconversion -Woverloaded-virtual -o main main.cpp

This custom UserControl will appear as a regular combobox, but unlike the built-in ComboBox object, it can show the user a default string of text if they have not made a selection yet. In order to accomplish this, our UserControl will be made up of two Controls. Obviously we need an actual ComboBox...

Goto - http://www.jorambarrez.be/blog/2010/08/02/tutorial-a-bpmn-2-0-hello-world-with-activiti-5-0-alpha4-in-5-steps/ A very Good and detailed tutorial by Joram Barrez (one of the core Developer of Activiti)