Regular Expressions 101

Non-Capturing Group(?:\bfoo$(?=[^()]*$)|\G(?!^))

1st Alternative\bfoo$(?=[^()]*$)

\ban ASCII word boundary

foothe literal text foo (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Positive Lookahead(?=[^()]*\))

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\G(?!^)

\Gstart of current search

Negative Lookahead(?!^)

^start of line

Negated Character Class[^']*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Non-Capturing Group(?:'\h*[,:]\h*)?

?repeats the group contents below at most once:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\h*any horizontal whitespace character, repeated any number of times

Character Class[,:]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\h*any horizontal whitespace character, repeated any number of times

'the literal ' (39₁₀ / 47₈ / 27₁₆)

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

\w+any word character, repeated at least once

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:\bfoo\((?=[^()]*\))|\G(?!^))[^']*(?:'\h*[,:]\h*)?'\K\w+

New

foo('Alice')                    -> Expected Hits: Alice
foo('Alice', 'Bob', 'Charlie')  -> Expected Hits: Alice, Bob, Charlie
foo(flag ? 'Alice' : 'Bob')     -> Expected Hits: Alice, Bob

Regular Expression

Substitution