Regular Expressions 101

Explanation

Pro

\ba Unicode word boundary

Non-Capturing Group(?:[A-Z]{3,}\b|(?:[A-Za-z]\.){2,})

1st Alternative[A-Z]{3,}\b

Character Class[A-Z]{3,}

{3,}matches at least 3 characters from the set below:

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

\ba Unicode word boundary

2nd Alternative(?:[A-Za-z]\.){2,}

Non-Capturing Group(?:[A-Za-z]\.){2,}

{2,}repeats the group contents below at least 2 times:

Character Class[A-Za-z]

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

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\s*a Unicode whitespace character, repeated any number of times

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

\b(?:[A-Z]{3,}\b|(?:[A-Za-z]\.){2,})\s*

New

Testing TES IIT abc
A.B.c.
A.I.P.M.T
a.b.c
a.b.c.
a.b. c
a.b c

Testing TES IIT abc
A.B.c.
A.I.P.M.T
a.b.c
a.b.c.
a.b. c
a.b c