JQuery Programmer Interview Question:

What are the approaches of extracting a query string with regular expressions?

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There are two approaches of doing so:

1. String based approach : This is the simple way of extracting the information of a query string using the string-based replacement technique. This method makes use of the .replace() method to function.
For ex :
var data = string.replace("http://localhost/view.php?", "");

The above code works fine for the string based approach but has some flexibility issues. It cannot deal effectively with domain name and file name changes.

2. Regular expression approach : They are a powerful pattern matching tool available in modern programming languages. For the extraction of a query string a pattern would have to be used which looks for a question mark in the string. Once it does it returns everything after it. The regular expression in JS are delimited using the forward slashes at the end of an expression.
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