Regular Expressions 101

Pro

1st Alternative(\b(?:\p{Lu}\.){2,})

Group 1(\b(?:\p{Lu}\.){2,})

\ba Unicode word boundary

Non-Capturing Group(?:\p{Lu}\.){2,}

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

\p{Lu}an uppercase letter

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative[^0-9\p{L}]

Negated Character Class[^0-9\p{L}]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\p{L}any Unicode letter

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

u modifier: unicode. Treats the pattern and subject as UTF-16

Detailed match information will be displayed here automatically.

25 tokens

(\b(?:\p{Lu}\.){2,})|[^0-9\p{L}]

New

F.B.I.Federal.Bureau.of.Investigation

F.B.I.Federal.Bureau.of.Investigation