Regular Expressions 101

Positive Lookahead(?=.*,$)

.*any character (except for line terminators), repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

$end of line

Non-Capturing Group(?:"((?:\\.|[^"])*)"|([^,]*))

1st Alternative"((?:\\.|[^"])*)"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1((?:\\.|[^"])*)

Non-Capturing Group(?:\\.|[^"])*

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

2nd Alternative[^"]

Negated Character Class[^"]

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative([^,]*)

Group 2([^,]*)

Negated Character Class[^,]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:[,])

Character Class[,]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

(?=.*,$)(?:"((?:\\.|[^"])*)"|([^,]*))(?:[,])

New

"",huhu,"hel  lo",world,
hello,"worl\"d",end,
hello,worl"d,end,
hello, world, nomatch