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A column is NULL when it has no value, regardless of the data type of that column. A column should never be compared to NULL using this syntax a = NULL as the result would be UNKNOWN. Instead use a IS NULL or a IS NOT NULL conditions. NULL is not equal to NULL. To compare two expressions where null...

A soon as application have several pages/screens, a way of navigating among them is needed. With UWP applications, the navigation is handled by the [Frame][1] control. It displays [Page][2] instances, support the navigation to new pages and keep an history both for backward and forward navigation ...

C++/CLI is a Microsoft-specific dialect of C++ which interoperates well with .NET. Originally, it was envisioned as the "most powerful" of .NET languages and included designer support for WinForms applications. However, new development on C++/CLI has all but ceased, and Microsoft now ...

This section provides an overview of what mqtt is, and why a developer might want to use it. It should also mention any large subjects within mqtt, and link out to the related topics. Since the Documentation for mqtt is new, you may need to create initial versions of those related topics.

A Pair is one of the most basic data type in scheme. It is also usually called cons cells.

As the name implies, vector drawables are based on vector graphics. Vector graphics are a way of describing graphical elements using geometric shapes. This lets you create a drawable based on an XML vector graphic. Now there is no need to design different size image for mdpi, hdpi, xhdpi and etc. W...

This section provides an overview of what automation is, and why a developer might want to use it. It should also mention any large subjects within automation, and link out to the related topics. Since the Documentation for automation is new, you may need to create initial versions of those rel...

A notorious common question is "how to send notifications from device to device", sadly the answer is: you can't. FCM needs to be triggered in order to send push notifications. That can be done in 3 different ways: Directly in the Firebase web console Setting a Firebase Functions li...

Examples on how to save the created Excel sheet to the Disk or send it to the Browser.

This document covers TCP/IP networking, network administration and system configuration basics. Linux can support multiple network devices. The device names are numbered and begin at zero and count upwards. For example, a computer with two NICs will have two devices labeled eth0 and eth1.

When you receive an error: "Microsoft Access has encountered a problem and needs to close", there is often not a lot of information to help you identify the cause of the error. Below are a series of steps you can take to troubleshoot the cause of the errors. Be sure to remove other vari...

This section provides an overview of what amazon-cloudformation is, and why a developer might want to use it. It should also mention any large subjects within amazon-cloudformation, and link out to the related topics. Since the Documentation for amazon-cloudformation is new, you may need to cre...

This Simple Google App Web Script (Standalone) allows Google Drive to be repeated polled for files to be downloaded to the user's local PC. Shows how to use one app script to provide the function of both the: 1. User interface (a simple one in this example) 2. The file download page. For a fu...

This topic will introduce you to some of the basic cmdlets used within the Active Directory Module for PowerShell, for manipulating Users, Groups, Computers and Objects. Please remember that PowerShell's Help System is one of the best resources you can possibly utilize. Get-Help Get-ADUser -Full...

Instance method are methods that are specific to particular classes. Instance methods are declared and defined followed by - (minus) symbol. Class methods can be called by class name itself .Class methods are declared and defined by using + (plus)sign . -(void)testInstanceMethod; //Class meth...