Regex have variants; though most have similarities to each other, the different engines also have noticeable differences. For instance, Ruby supports the \A and \z anchors, while JavaScript does not.

\w - matches an Unicode word character. That's any letter, uppercase or lowercase, numbers, and the underscore character. In "new-releases-204", \w would match each of the letters in "new" and ...

I was involved in a recent discussion on the "best" way to remove a given parameter from a URL string. The conversation began with using string primitives to split and join the parameter, a method ...