Regular Expressions 101

Pro

Non-Capturing Group(?:^|\n| )

1st Alternative^

^start of line

2nd Alternative\n

\na line-feed (newline) character (ASCII 10)

3rd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:[^.!?]|[.!?][^ *_~\n])+

+repeats the group contents below at least once:

1st Alternative[^.!?]

Negated Character Class[^.!?]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

2nd Alternative[.!?][^ *_~\n]

Character Class[.!?]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Negated Character Class[^ *_~\n]

the literal (32₁₀ / 40₈ / 20₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

\na line-feed (newline) character (ASCII 10)

Character Class[.!?]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Positive Lookahead(?=\s)

\sany whitespace character

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.

25 tokens

(?:^|\n| )(?:[^.!?]|[.!?][^ *_~\n])+[.!?](?=\s)

New

foo0 
b<!-- comment -->ar.
foo1 bar?
<!-- comment -->

foo2bar!
<!-- comment -->

foo0 
b<!-- comment -->ar.
foo1 bar?
<!-- comment -->

foo2bar!
<!-- comment -->