title: How does \b work when using regular expressions?
body: <p>If I have a sentence and I wish to display a word or all words after a particular word has been matched ahead of it, for example I would like to display the word <code>fox</code> after <code>brown</code> <code>The quick brown fox jumps over the lazy dog</code>, I know I can look positive look behinds e.g. <code>(?&lt;=brown\s)(\w+)</code> however I don't quite understand the use of \b in the instance <code>(?&lt;=\bbrown\s)(\w+)</code>. I am using <a href="http://gskinner.com/RegExr/" rel="noreferrer">http://gskinner.com/RegExr/</a> as my tester.</p>