Regular Expressions 101

Pro

Negative Lookbehind(?<![^\W_])

Negated Character Class[^\W_]

\Wany character that is not a Unicode word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

intthe literal text int (case sensitive)

Negative Lookahead(?![^\W_])

Negated Character Class[^\W_]

\Wany character that is not a Unicode word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

(?<![^\W_])int(?![^\W_])

New

int # match
_int_ # match
__int__ # match
some_int # match
integration # doesn't match
mint # doesn't match

int # match
_int_ # match
__int__ # match
some_int # match
integration # doesn't match
mint # doesn't match