Regular Expressions 101

Pro

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

1st Alternative^

^start of line

2nd Alternativecalled\s+

calledthe literal text called (case sensitive)

\s+any whitespace character, repeated at least once

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

Character Class[A-Z]

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

Character Class[a-z]*

*matches any number of characters from the set below:

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

Non-Capturing Group(?:\s+[A-Z][a-z]*)*?

*?repeats the group contents below any number of times:

\s+any whitespace character, repeated at least once

Character Class[A-Z]

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

Character Class[a-z]*

*matches any number of characters from the set below:

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

Positive Lookahead(?=(?:\s+and)?\s+can\s+overcome)

Non-Capturing Group(?:\s+and)?

?repeats the group contents below at most once:

\s+any whitespace character, repeated at least once

andthe literal text and (case sensitive)

\s+any whitespace character, repeated at least once

canthe literal text can (case sensitive)

\s+any whitespace character, repeated at least once

overcomethe literal text overcome (case sensitive)

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

No unit tests · Add a test to get started

25 tokens

(?:^|called\s+)\K[A-Z][a-z]*(?:\s+[A-Z][a-z]*)*?(?=(?:\s+and)?\s+can\s+overcome)

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