Regular Expressions 101

Pro

^start of line

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

Negative Lookbehind(?<!s)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

s{2}the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive), repeated exactly 2 times

$end of line

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

Detailed match information will be displayed here automatically.

27 tokens

^.*(?<!s)s{2}$

foo
foos
foosss
sometexts
sometextsss

fooss
barss
sometextss

foo
foos
foosss
sometexts
sometextsss

fooss
barss
sometextss