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

    …, select "landing page" as the primary dimension. Then click on "advanced" and select "Exclude" and "Matching RegExp." Formulate your query to include any of the options - hooli, holi, or wholi. There are other ways to do this; for example, you could use w?hoo?li as the command instead, but that gets a little too complicated. So stick with hooli|holi…

    Jenny Halasz/ Search Engine Landin SEO- 25 readers -