[[ja:カテゴリ・正規表現]] 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 over ##ReBuilder##. * Regex-tool -- similar to ReBuilder, found at http://github.com/jwiegley/regex-tool. See article [[http://www.newartisans.com/2007/10/a-regular-expression-ide-for-emacs.html|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