Regular Expressions

In theoretical computer science and formal language theory, a regular expression (abbreviated regex or regexp) is a sequence of characters that forms a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. The concept arose in the 1950s, when the American mathematician Stephen Kleene formalized the description of a regular language, and came into common use with the Unix text processing utilities ed, an editor, and grep (global regular expression print), a filter.Each character in a regular expression is either understood to be a metacharacter with its special meaning, or a regular character with its literal meaning.
Posts about Regular Expressions
  • A Marketer’s Guide To Using Regular Expressions In SEO

    … Regular expressions (regex) are one of the most powerful tools we have in our SEO arsenal, but they're incredibly intimidating! Here are some tips and tricks from one SEO to another that I hope will help you dip your toes into the powerful world of regex. I must begin with a disclaimer: I'm not a coder, a developer or a network admin. My use…

    Jenny Halasz/ Search Engine Landin SEO- 23 readers -
Get the top posts daily into your mailbox!