Regular Expressions primer

# Regular Expressions

Identifiers:
\d Any number 
\D Anything but a number
\s Space
\S Anything but a space
\w Any character
\W Anything but a character
. Any character except for a new line
\b Whitespace around words
\. A period

Modifiers:
{1,3} We are expecting 1-3
+ Match 1 or more
? Match 0 or 1
* Match 0 or more
$ Match the end of a string
^ Match the beginning of a string
| Either or E.g. \d{1-3}|\w {5-6}
[] Range or "variance" [A-Z] or [A-Za-z] [1-5a-qA-Z]
{x} Expecting "x" amount

White Space Characters:
\n New line
\t Tab
\s Space
\f Form
\e Escape
\r Return

DON'T FORGET! . + * ? [ ] $ ^ ( ) { } | \