Regular Expressions 101

Pro

1st Alternative(?<!\d)\.(?!\d)

Negative Lookbehind(?<!\d)

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!\d)

\da digit

2nd Alternative[^a-zA-Z\d. ]+

Negated Character Class[^a-zA-Z\d. ]+

+matches at least one character outside the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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.

27 tokens

(?<!\d)\.(?!\d)|[^a-zA-Z\d. ]+

New

the. book - 5. cost 7.55 dollars.

the. book - 5. cost 7.55 dollars.