var r = "d{1,3}.d{1,3}.d{1,3}.d{1,3}"; //http://www.regular-expressions.info/examples.html
var a = "http://www.example.com/landing.aspx?referrer=10.11.12.13";
var t = a.match(r); //Expecting the ip address as a result but gets null
The above is my code to extract ip address from a string. But it fails to do so. Kindly advice where it fails.
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