How to use the union function from xregexp

example.js

GitHub: ULL-ESIT-GRADOII-PL/xregexp-example

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]);
console.log(result); // -> ['xregexp.com', 'www.google.com']

// Merge strings and regexes into a single pattern with updated backreferences
// http://xregexp.com/api/#union
var merge = XRegExp.union(['a+b*c', /(dog)\1/, /(cat)\1/], 'i');
// Patterns can be provided as regex objects or strings. 
// Metacharacters are escaped in patterns provided as strings.
// Backreferences in provided regex objects are automatically renumbered 
// to work correctly within the larger combined pattern. 

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