Regular Expressions 101

.*any character (except for line terminators), repeated any number of times

Positive Lookahead(?=\bbet\b)

\ban ASCII word boundary

betthe literal text bet (case insensitive)

\ban ASCII word boundary

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

.*(?=\bbet\b).*

I bet he's a virgin!
Bet you're glad you flew out there.
I betty he's a virgin!
Betty you're glad you flew out there.