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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

a reference to a particular day represented within a calendar system, and consists of year, month and day.
61915 questions
a framework that allows developers to create cross-platform mobile applications using web technologies like HTML, JavaScript, and CSS.
an open source distributed data processing engine written in Scala providing a unified API and distributed data sets to users. Use Cases for Apache Spark often are related to machine/d…
59856 questions
a software system designed to support interoperable machine-to-machine interaction over the World Wide Web.
used to check data to make sure it fits whatever required specifications are set for it. Typically Validation is used in checking input data, and in verifying data before storage.
59618 questions
An endpoint of a bi-directional inter-process communication flow. This often refers to a process flow over a network connection, but by no means is limited to such. Not to be confused with WebSocket (…
59002 questions
an application level network protocol that is used for the transfer of content on the World Wide Web.
57740 questions
an open-source, progressive Javascript framework for building user interfaces that aim to be incrementally adoptable. Vue.js is mainly used for front-end development and requires an intermed…
57617 questions
a library for real time computer vision. When using this tag, please mention the OpenCV release you're working with (e.g. 3.4.6), and add a language specific ta…
57270 questions
an open source library and API designed for deep learning, written and maintained by Google. Use this tag with a language specific tag ([python], [c++], [javascript], [r], etc.) for ques…
57101 questions
an open-source web development framework written in Ruby. Ruby on Rails follows the principle of convention over configuration, freeing you from having to re-invent things to stay pro…
Extensible Application Markup Language (XAML) is a declarative XML-based language used for initializing structured values and objects in various frameworks. When a question is about the usage of XAML…
55735 questions
A layout defines the visual structure for a user interface, such as the UI for an activity, fragment or app widget.
55172 questions
A dictionary maps keys to values allowing efficient retrieval of values from keys. USE [map-function] tag about mapping functions over data, PLEASE ; and for geography, [maps].
54819 questions
A DateTime object in many programming languages describes a date and a time of day. It can express either an instant in time or a position on a calendar, depending on the context in which it is used …
54442 questions
A framework for building Java web applications based on the Model-View-Controller (MVC) pattern. It promotes flexible and decoupled code from the underlying view technologies.
53717 questions
for questions specific to the 2008 version of Microsoft's SQL Server.
for questions involving code to send or receive email messages. Posting to ask why the emails you send are marked as spam is off-topic for Stack Overflow. Questions about configuration o…
53005 questions
a programming paradigm using "objects": data structures consisting of data fields and methods together with their interactions.
52266 questions
a control structure used by many programming languages to iterate over a range. It is a way of repeating statements a number of times until the loop ends. Depending on the language this …
51484 questions
for code that must compile as C++11 (not using any features introduced in C++14 or later).
51207 questions
any entity that can be manipulated by commands in a programming language. An object can be a value, a variable, a function, or a complex data-structure. In object-oriented programming, an…
51070 questions
a cross-platform game engine with a built-in IDE developed by Unity Technologies.
50954 questions
a Java-based view technology running on the server machine which allows you to write template text in (the client side languages like HTML, CSS, JavaScript and so on) and int…
50929 questions
Topics relating to application security and attacks against software. Please don't use this tag alone, that results in ambiguity. If your question is not about a specific programming problem, please …
50163 questions
Parsing refers to breaking an artifact into its constituent elements and capturing the relationship between those elements. This tag isn't for questions about the self hosted Parse Platform (use the […
50115 questions
a part of the .NET Framework that provides a unified programming model for rapidly building service-oriented applications.
a graphical screen control or widget provided by UI libraries in a majority of modern operating systems to show items in a list form.
49789 questions
OFF-TOPIC. Support questions may be asked on http://askubuntu.com/. Ubuntu is a free desktop and server operating system based on Debian GNU/Linux. Note that this is for pro…
49452 questions
the system through which people interact with a computer. This tag can be used for UI-related programming questions. Note that there's a separate Stack Exchange site for User In…
48765 questions
a plotting library for Python which may be used interactively or embedded in stand-alone GUIs. Its compact "pyplot" interface is similar to the plotting functions of MATLAB®.
48432 questions
a text file containing a series of commands that are executed by the command interpreter on MS-DOS, IBM OS/2, or Microsoft Windows systems.
48102 questions
Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase.
47497 questions
Data type that "points to" another value stored in memory. A pointer variable contains a memory address of some other entity (variable or function or other entity). This tag should be used for questio…
47262 questions
a flow control structure in most programming languages that branches execution flow depending on a binary condition, generally evaluated at runtime. If statements are also commonl…
47204 questions
an integrated development environment (IDE) from Microsoft. Use this tag only for questions arising from the use of this particular version of Visual Studio, and not about any co…
46890 questions