Regular Expressions 101

Pro

1st Alternative[A-Z]\S*\.[^\S\r\n]+[A-Z]

Character Class[A-Z]

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

\S*any non-whitespace character, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^\S\r\n]+

+matches at least one character outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Character Class[A-Z]

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

2nd Alternative(?:^|[.!?][\t ]+)([A-Z]\S*)

Non-Capturing Group(?:^|[.!?][\t ]+)

1st Alternative^

^start of line

2nd Alternative[.!?][\t ]+

Character Class[.!?]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Character Class[\t ]+

+matches at least one character from the set below:

\ta tab character (ASCII 9)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 1([A-Z]\S*)

Character Class[A-Z]

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

\S*any non-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

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25 tokens

[A-Z]\S*\.[^\S\r\n]+[A-Z]|(?:^|[.!?][\t ]+)([A-Z]\S*)

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