EmacsWiki: Category Regexp (original) (raw)
This category is about regular expressions. See also CategorySearchAndReplace.
Understanding Regular Expressions
- RegularExpression – what are regular expressions, anyway?
- RegularExpressionHelp – typical errors and frequently asked questions
- RegexpReferences – where to look for more information
- CaseFoldSearch – controlling case sensitivity when searching
- MultilineRegexp – how to match multiline content
- NonAsciiRegexps – dealing with non-ASCII characters
- NonGreedyRegexp – how to write
.*?in old emacsen
Using Regular Expressions Interactively
- IncrementalSearch#RegexpSearches – Using regexps with Isearch – a good way to learn to use regexps
- Icicles – Another good way to learn to use regexps – lots of different uses, including:
- Completion and cycling of completion candidates through regexp matching
- a new kind of incremental search: use multiple simple regexps, instead of struggling with a complex regexp; and regexp subgroups are highlighted individually
- GrepMode –
‘M-x grep’searches files for matches - OccurBuffer –
‘M-x occur’works on buffers like‘M-x grep’does on files - SearchBuffers – Search all buffers
- SearchAndReplaceDelimitedStrings – Replace the prefix and suffix of a pattern while leaving the middle alone
- GrepList – search a list of strings for a regexp, recursing into sublists
- OverlappingRegexps – overlap regular expressions in a replace command
- RecursiveGrep – various commands that recursively search a file system
Programming with Regular Expressions
- ReBuilder – build a regexp string and watch what it matches as you type
- VisualRegexp – like
‘M-x replace-regexp’, but with live visual feedback directly in the buffer. Improvement overReBuilder. - Regex-tool – similar to ReBuilder, found at http://github.com/jwiegley/regex-tool. See article A regular expression IDE for Emacs by JohnWiegley
- SymbolicRegexp – for programmers who want to write readable regular expressions
- rx – macro that generates regexps from SymbolicRegexp