⚠️ NOTE: If you have any questions regarding the content presented below, feel free to post them here. I will be happy to help anyway I can! Regex is a big passion of mine and I look forward to hearing from you. 😁

Character classes have some shortcut equivalents. These are called metacharacters. Here are some popular ones:
.
~> match any character but not a new line
\w
~> [a-zA-Z0-9_]
\W
~>[^a-zA-Z0-9_]
\d
~> [0-9]
\D
~> [^0-9]
\t
~> tab!
\n
~> line break
\s
~> any white space (Tab, line break)
\
~> white space
You’ve already seen some characters like <strong>[ ]</strong>
that have special meaning. To use it’s literal equivalent you need to ‘escape’ that character. To do that you put a slash \
in front.
Example: literal square brackets = \[
\w Example

\d Example

mOAR