Questions about data comparison and efficient ways to accomplish it. Please avoid using this tag for generic (meta) comparison of two issues or concepts.

Markdown is a plain text formatting syntax designed so that it can be converted to HTML using a tool by the same name. Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor.

Implementation questions about data science. Data science concerns extracting knowledge or insights from data, in whatever shape or form. It can contain predictive analytics and usually takes a lot of data wrangling. General questions about data science should be posted to their respective communities.

A table view is a means for displaying and editing hierarchical lists of information. For example: UITableView in Cocoa Touch.

A left join is an outer join which generates a result that contains all the records of the "left" table even when there are no matching records in other tables taking part in the join.

An error or exception which is thrown when a program makes a request for memory that cannot be satisfied.

A virtual-machine is software emulating complete computer hardware. There are various applications that supply this functionality. **Note**: For questions on the Java VM, use the specific tag [jvm], and for the Android virtual machine, use the tag [dalvik]. For other questions on implementation details of other kinds of VMs like interpreters, automata or Turing-machines, use the tag [vm-implementation]. ONLY QUESTIONS ABOUT PROGRAMMING ARE ON-TOPIC.

**DO NOT USE! This tag refers to an entirely opinionated subject and is therefore no longer on-topic.** Questions that follow coding style and conventions.

Cygwin is a collection of GNU and other Unix-like FOSS tools which run on MS Windows and provide functionality similar to a GNU/Linux distribution while (mostly) conforming to POSIX specifications. Use this tag for questions about developing programs and/or scripts to run in this environment. Questions on the *use* of tools in a Cygwin environment are more appropriate for Super User (https://superuser.com).

An easy-to-use navigation solution to be used in React Native projects

Apache (HTTP Server) /əˈpætʃiː/ is a modular cross-platform web server software with a large variety of features(called modules) including SSL, compression, log, proxy and server-side programming language interfaces like Perl, Python, Tcl, and PHP.