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A regular expression (regex) is a pattern that describes a set of strings. Regular expressions are used for advanced context-sensitive searches (e.g. parsing data streams, data mining) and text modifications. They can be found in many advanced editors (e.g. vi, Emacs), in parser programs (e.g. grep) and in languages (e.g. Perl), mostly in a UNIX environment. This book is the standard work on regexes.

Programming --- Computer programming --- Perl (Computer program language) --- Text processing (Computer science) --- 681.3 --- Internet : scripttalen --- Programmeren --- Processing, Text (Computer science) --- Database management --- Electronic data processing --- Information storage and retrieval systems --- Word processing --- Pathologically Eclectic Rubbish Lister (Computer program language) --- Practical Extraction and Report Language (Computer program language) --- Scripting languages (Computer science) --- Computers --- Electronic computer programming --- Electronic digital computers --- Programming (Electronic computers) --- Coding theory --- Regular expressions --- 004.4 --- Reguliere expressie