Meta-characters. There are special characters in regular expressions, some of them include: d matches any digit, equivalent to [0-9]; D matches any character that’s not a digit, equivalent to ...

The latest JavaScript specification standardizes a well-balanced and thoughtful set of features, including the built-in ...

JavaScript’s RegExp object, which holds a regular expression, is what we need here. Regular expressions are a big subject, and there are plenty of FAQs on them on the Web.

To take advantage of this power, you have to learn the symbols used to build searches (see the table, “Decoding Regular Expressions,” for a partial list).

Among the characters used in such regular expressions, '^' matches the beginning of a line, and '$' matches the end of the line. These two characters first appeared in Ken Thompson's port of ...