Regex

A sequence of characters that specifies a search pattern

Character	Description
\d	Shorthand for [0-9]
\w	Word character ([A-Za-z0-9_])
\s	Whitespace character ([ \t\r\n\f])
^	Start of line
$	End of line
?=	Positive Lookahead

Two conditions

foo must appear anywhere and baz must appear anywhere, not neccessarily in that order.

(?=.*foo)(?=.*baz)