Tutorial by Topics: q

The class template std::integer_sequence<Type, Values...> represents a sequence of values of type Type where Type is one of the built-in integer types. These sequences are used when implementing class or function templates which benefit from positional access. The standard library also contain...

The Queue module implements multi-producer, multi-consumer queues. It is especially useful in threaded programming when information must be exchanged safely between multiple threads. There are three types of queues provides by queue module,Which are as following : 1. Queue 2. LifoQueue 3. Prior...

We know that spring-boot by default runs using H2 database. In this article, we will see how to tweak the default configuration to work with MySQL database. As a pre-requisite, make sure that MySQL is already running on port 3306 and has your database created.

When working with an web application it's sometimes important to access data included in the request, beyond the URL. In Flask this is stored under the global request object, which you can access in your code via from flask import request.

.bash_profile, .bash_login, .bashrc, and .profile all do pretty much the same thing: set up and define functions, variables, and the sorts. The main difference is that .bashrc is called at the opening of a non-login but interactive window, and .bash_profile and the others are called for a login she...

From Adminer management tool it's has export to csv file option for mysql database But not available for postgresql database. Here I will show the command to export CSV for postgresql database.

This section provides an overview of what PyQt4 is, and why a developer might want to use it. PyQt is a GUI widgets toolkit. It is a Python interface for Qt, one of the most powerful, and popular cross-platform GUI library. PyQt is a blend of Python programming language and the Qt library. This ...

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

The examples will be based on a copy of the demo database Sports 2000 provided with the setup of Progress. When working with queries in Progress you need to: DEFINE the query and set what buffers (tables) and fields it works against. OPEN the query with a specific WHERE-clause that defines how to...

Sometimes we need to build QtWebEngine from source for some reason, such as for mp3 support.

We may use QML to build hybrid applications, since it's much more easier than C++. So we should know how they communicate with each other.

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

The Qt Resource system is a way to embed files within your project. Each resource file can have one or more prefixes and each prefix can have files in it. Each file in the resources is a link to a file on the file system. When the executable is built, the files are bundled into the executable, so t...

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

RequireJS is an implementation of the Asynchronous Module (AMD) API used to load javascript files asynchronously (i.e. without blocking) and manage dependencies between multiple javascript files. It also includes an optimization tool for combining and minimizing script files for deployment while...

The goal of this topic is to document best practices when asking Apache Spark related questions.

The Sequential model is a linear stack of layers.

Quick examples for MID LEFT and RIGHT string functions using INSTR FIND and LEN. How do you find the text between two search terms (Say: after a colon and before a comma)? How do you get the remainder of a word (using MID or using RIGHT)? Which of these functions use Zero-based params and return c...