Regular Expressions 101

Pro

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!(?<=\d\.)\d)

Positive Lookbehind(?<=\d\.)

\da Unicode decimal digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da Unicode decimal digit

Negative Lookahead(?! )

the literal (32₁₀ / 40₈ / 20₁₆)

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

\.(?!(?<=\d\.)\d)(?! )

New

this is a.match
this should also match.1234
and this should 123.match

this should NOT match. Has space after period
this also should NOT match 1.23

this is a.match
this should also match.1234
and this should 123.match

this should NOT match. Has space after period
this also should NOT match 1.23