Regular Expressions 101

Positive Lookbehind(?<=(?<![.\s])[a-zA-Z])

Negative Lookbehind(?<![.\s])

Character Class[.\s]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\sa Unicode whitespace character

Character Class[a-zA-Z]

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

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Regular Expression

(?<=(?<![.\s])[a-zA-Z])\.

New

This is the U.A. we have r.a.d. golden 13.56 date. a better date 34. was there.