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Regular languages are a category of languages (sometimes termed Chomsky Type 3) which can be matched by a state machine (more specifically, by a deterministic finite automaton or a nondeterministic finite automaton) constructed from a regular expression. In particular, a regular language can match constructs like "A follows B", "Either A or B ...
Sam is a multi-file text editor based on structural regular expressions.It was originally designed in the early 1980s at Bell Labs by Rob Pike with the help of Ken Thompson and other Unix developers for the Blit windowing terminal running on v9 Unix; [1] it was later ported to other systems.
RE2 is a software library which implements a regular expression engine. It uses finite-state machines, in contrast to most other regular expression libraries. RE2 supports a C++ interface. RE2 was implemented by Google and Google uses RE2 for Google products. [3]
Regular Expression Flavor Comparison – Detailed comparison of the most popular regular expression flavors; Regexp Syntax Summary; Online Regular Expression Testing – with support for Java, JavaScript, .Net, PHP, Python and Ruby; Implementing Regular Expressions – series of articles by Russ Cox, author of RE2; Regular Expression Engines
The insert mode allows for the insertion of text into the document, whereas in the normal text input is interpreted as commands. [ 2 ] [ 5 ] A digital assistant represented as an ASCII art of a paper clip is also integrated into the editor which helps guide users through the keybindings, features and workflows provided by the editor.
Regular expressions are used in search engines, in search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK, and in lexical analysis. Regular expressions are supported in many programming languages. Library implementations are often called an "engine", [4] [5] and many of these are ...
Multi-Edit contains tools for programmers, including macros, configurable syntax highlighting, code folding, file type conversions, project management, regular expressions, three block highlight modes including column, stream and line modes, remote editing of files via FTP and interfaces for APIs or command lines of choice [clarification needed].
Scintilla's regular expression library can also be replaced or avoided with direct buffer access. Currently, Scintilla has experimental support for right-to-left languages. [4] Scinterm is a version of Scintilla for the curses text user interface. It is written by the developer of the Textadept editor.