Sample Regular Expressions| www.regular-expressions.info
How to Find or Validate an Email Address| www.regular-expressions.info
Use PowerGREP to quickly search through large numbers of text and binary files, such as source code, correspondence, logs, ... to find exactly what you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...| www.powergrep.com
In a regular expression, parentheses can be used to group regex tokens together and for creating backreferences. Backreferences allow you to reuse part of the regex match in the regex, or in the replacement text.| www.regular-expressions.info
PowerGREP is a powerful Windows grep tool for searching through files and folder, performing complex search and replace operations across a variety of files, and collecting information and statistics from files.| www.regular-expressions.info