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ParameterDetailsrequiredThe field is requiredsometimesRun validation checks against a field only if that field is present in the input arrayemailThe input is a valid emailmax:valueThe input value should be below the maximum valueunique:db_table_nameThe input value should be unique in the provided ...

Not all HTML tags are of the same structure. While most elements require an opening tag, a closing tag, and contents, some elements - known as void elements - only require an opening tag as they themselves do not contain any elements. This topic explains and demonstrates the proper usage of void ele...

Middleware is a software component that will determine how to process the request and decide whether to pass it to the next component in the application pipeline. Each middleware has a vary specific role and actions to preform on the request.

Middleware in Django is a framework that allows code to hook into the response / request processing and alter the input or output of Django. Middleware needs to be added to your settings.py MIDDLEWARE_CLASSES list before it will be included in execution. The default list that Django provides ...

intellij-idea is an IDE made as the spiritual successor for the widely-adopted Eclipse IDE used for Java development. Eclipse, although extremely powerful, is often criticized for being extremely clunky and difficult to use. Intellij IDEA attempts to build an IDE with similar power to Eclipse, bu...

It's up to clients of the class implementing IDisposable to make sure they call the Dispose method when they are finished using the object. There is nothing in the CLR that directly searches objects for a Dispose method to invoke. It's not necessary to implement a finalizer if your object...

DEX means Android app's (APK) executable bytecode files in the form of Dalvik Executable (DEX) files, which contain the compiled code used to run your app. The Dalvik Executable specification limits the total number of methods that can be referenced within a single DEX file to 65,536 (64K)—includin...

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

Fragments are very important components of user interface in android apps. They were introduced first in Android 3.0 (Honeycomb) API. Understanding design paradigm of Fragments Fragments were introduced for primarily supporting modular and flexible UI on large screen devices such as tablets. ...

What is android-gradle android-gradle is a gradle plugin officially maintained by Google Tools developer team and is the official build tool since the announcement in May 16, 2013 at the Google I/O. Learn the basic by reading Configure your build with Gradle. Main features The main feature...

Instant Run is an extended behavior for the run and debug commands that enables faster debugging by not requiring a full build and reinstall for eevry change done in your app's code. Introduced in Android Studio 2.0, Instant Run is a behavior for the Run and Debug commands that significantly ...