Game Programming using Qt 5 Beginner's Guide - Second Edition

Regular expressions

Let's briefly talk about regular expressions—usually shortened as "regex" or "regexp". You will need these regular expressions whenever you have to check whether a string or part of it matches a given pattern or when you want to find specific parts inside the text and possibly want to extract them. Both the validity check and the finding/extraction are based on the so-called pattern of the regular expression, which describes the format a string must have to be valid, to be found, or to be extracted. Since this book is focused on Qt, there is unfortunately no time to cover regular expressions in depth. This is not a huge problem, however, since you can find plenty of good websites that provide introductions to regular expressions ...