Which of the following regular expressions would extract the URL from this line of HTML:1<p>Please click <a href="http://www.dr-chuck.com">here</a></p>1 pointhref="(.+)"href=".+"http://.*<.*>
Question
Which of the following regular expressions would extract the URL from this line of HTML:1<p>Please click <a href="http://www.dr-chuck.com">here</a></p>1 pointhref="(.+)"href=".+"http://.<.>
Solution
The correct regular expression to extract the URL from the given line of HTML is href="(.+)".
Here's how it works:
-
href=": This part of the regular expression matches the exact sequence of characters that start the URL in the HTML line. -
(.+): This part is a capturing group that matches one or more of any character except a newline. The parentheses()define the group, and the.matches any character except a newline. The+means "one or more of the preceding element." So, together,(.+)will match and capture the sequence of characters that make up the URL. -
": This part of the regular expression matches the exact character that ends the URL in the HTML line.
So, when applied to the HTML line, the regular expression href="(.+)" will match and extract the URL http://www.dr-chuck.com.
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