Question

158

Extract ip address from a string using regex

rated 0 times [ 163] [ 5] / answers: 1 / hits: 19868 / 9 Years ago, mon, september 21, 2015, 12:00:00

 var r = bd{1,3}.d{1,3}.d{1,3}.d{1,3}b; //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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karivictoriab

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answered 9 Years ago santiago · Accepted Answer

You have defined r as string, initialize it as regular expression.

var r = /bd{1,3}.d{1,3}.d{1,3}.d{1,3}b/;

var r = /bd{1,3}.d{1,3}.d{1,3}.d{1,3}b/; //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);

console.log(t[0])