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## regex_tutorial_wonjong.md

      
        
          
            
              
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              Last active
              June 24, 2022 22:21
            
              
                Tutorial for Regex Expression
              
          
        
      
        
  
      
    Regular Expression Tutorial (Matching a URL)

A Regular Expression (shortened as 'regex' or 'regexp') is a sequence of characters that defines a specific search patten in text. Most general-purpose programming launguages support regex capabilities either natively or via libraries, including for example JavaScript, Python, C, C++ and Java.
Summary

In this Gist, Let's break down the regex for matching a URL and take a look at each component.

Matching a URL : /^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/