Regex Cheat Sheet

1.  Matching a set of words :  Hello Brick, Brik data ,Brck -->. Bri?c?k.  

More:

^

Start

$

End

a?	one or more a

(?i)	case insensitive

a{3}	exactly 3 of  a

a{3,6}

between 3 and 6 of  a

(.*)(?i)(tech?i?e)(.*?)

tech, techi, techie, techie house, the techie house

\d	Any digit, short for [0-9]
\D	A non-digit, short for [^0-9]
\s	A whitespace character, short for [ \t\n\x0b\r\f]
\S	A non-whitespace character, short for
\w	A word character, short for [a-zA-Z_0-9]
\W	A non-word character [^\w]
\S+	Several non-whitespace characters
\b	Matches a word boundary where a word character is [a-zA-Z0-9_]

^\d{4}\sHELLO\s	1234 HELLO some-other words
\S	A non-whitespace character, short for
\w	A word character, short for [a-zA-Z_0-9]
\W	A non-word character [^\w]
\S+	Several non-whitespace characters
\b	Matches a word boundary where a word character is [a-zA-Z0-9_]

Try out:  https://regex101.com/