Regular Expressions 101

Non-Capturing Group(?:^|\s)

1st Alternative^

^start of string

2nd Alternative\s

\sany whitespace character

Group 1(#[a-zA-Zа-яА-Я]+[,.!:?\s]*)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Character Class[a-zA-Zа-яА-Я]+

+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)

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

Character Class[,.!:?\s]*

*matches any number of characters from the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\sany whitespace character

Positive Lookahead(?=\s[a-zA-Zа-яА-Я])

\sany whitespace character

Character Class[a-zA-Zа-яА-Я]

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

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

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

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

(?:^|\s)(#[a-zA-Zа-яА-Я]+[,.!:?\s]*)(?=\s[a-zA-Zа-яА-Я])

New

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