More on Character Classes (Regex)
This lesson discusses the character classes of regular expressions in detail.
We'll cover the following
Complement of a character class
So far, we’ve used character classes like [aeiou]
(listing all allowed characters literally) and [a-z]
(specifying a range of characters).
There’s more to these.
We can negate classes by prepending a not character (^
) inside the square brackets. For example, [^AEIOUaeiou]
allows every character that’s not a vowel. So, we can find all words that don’t start with a vowel:
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