Regular Expressions 101

Pro

1st Alternativecase_when\([^(]*%in%(*SKIP)(*FAIL)

case_whenthe literal text case_when (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^(]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

%in%the literal text %in% (case sensitive)

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*FAIL)forces the current match attempt to fail at this position

2nd Alternative[^(]*%in%

Negated Character Class[^(]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

%in%the literal text %in% (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

Detailed match information will be displayed here automatically.

25 tokens

case_when\([^(]*%in%(*SKIP)(*FAIL)|[^(]*%in%

New

a %in% c('b', 'e')
case_when(a %in% c('b', 'e'))
hello

a %in% c('b', 'e')
case_when(a %in% c('b', 'e'))
hello