Regular Expressions 101

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)*

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

Character Class[a-zA-Z]+

+matches at least one character from 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)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Positive Lookahead(?=\s*(?:\d+|$))

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

Non-Capturing Group(?:\d+|$)

1st Alternative\d+

\d+a digit, repeated at least once

2nd Alternative$

$end of string

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\d+(?:\.\d+)*[\s\S]*?[a-zA-Z]+\.(?=\s*(?:\d+|$))

 1 One without dot. 2. Some Random String. 3.1 With SubItens. 3.2 With Another SubItem. 4. List item. 11.12 More than one digit.