Tutorial by Topics: q

The QDialog class is the base class of dialog windows. A dialog window is a top-level window mostly used for short-term tasks and brief communications with the user. QDialogs may be modal or modeless. Note that QDialog (and any other widget that has type Qt::Dialog) uses the parent widget slight...

QR (Quick Response) codes are two-dimensional barcodes which are widely used on machine-readable optical labels. iOS do provide a way to read the QR codes by using AVFoundation framework from iOS 7 onwards. This framework provides set of API's to setup/open the camera and read QR codes from the came...

Sources The examples above are from lecture notes frome a lecture which was taught 2008 in Bonn, Germany. They in term are based on the book Algorithm Design by Jon Kleinberg and Eva Tardos:

A scheduler serves to perform background tasks at certain defined intervals. As per Liferay portlet DTD <!- The scheduler-entry element contains the declarative data of a scheduler. -> !ELEMENT scheduler-entry (scheduler-description?, scheduler-event-listener-class, trigger) <...

In this topic Spark Users can find different configurations of Spark SQL, which is the most used component of Apache Spark framework.

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.

COMMMENT main purpose is to define or change a comment on database object. Only a single comment(string) can be given on any database object.COMMENT will help us to know what for the particular database object has been defined whats its actual purpose is. The rule for COMMENT ON ROLE is that you m...

By going through this document You can get to know how to use SQL queries with powershell ItemDescription$ServerInstanceHere we have to mention the instance in which the database is present$DatabaseHere we have to mention the database in which the table is present$QueryHere we have to the query whi...

A jQuery plugin is simply a new method that we use to extend jQuery's prototype object. By extending the prototype object you enable all jQuery objects to inherit any methods that you add. As established, whenever you call jQuery() you're creating a new jQuery object, with all of jQuery's methods...

WP_Query to query for posts, pages and custom post types. You will get list for specific posts and pages or custom post types. WP_Query allows you to pull posts from the database according to your criteria.

Accessors and mutators allow you to format Eloquent attribute values when you retrieve or set them on model instances. For example, you may want to use the Laravel encrypter to encrypt a value while it is stored in the database, and then automatically decrypt the attribute when you access it on an E...

jQuery promises are a clever way of chaining together asynchronous operations in a building-block manner. This replaces old-school nesting of callbacks, which are not so easily reorganised.