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Analyze and act on text with the free Regular Expressions DLC pack!

Regular expressions are a set of rules that tell computers how to analyze text for patterns. You might use a regular expression to determine whether text meets a certain set of criteria, and potentially act on it by replacing and capturing matches. The Piecewise Regular Expressions add-on adds 4 blocks that allow you to utilize regular expressions.

With the Piecewise Regular Expressions add-on, you can use regular expressions to determine whether, for example:

• a file has a certain extension
  
• a message contains a URL
  
• a message contains characters that do not appear in a particular script (i.e. Latin)
  
• arbitrary text starts with or ends with a particular pattern