Regular Expressions 101

Group 1(["])

Character Class["]

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:(?!\1|"").|"".)*

*repeats the group contents below any number of times:

1st Alternative(?!\1|"").

Negative Lookahead(?!\1|"")

1st Alternative\1

\1the text saved by group 1

2nd Alternative""

""the literal text ""

.any character (except for line terminators)

2nd Alternative"".

""the literal text ""

.any character (except for line terminators)

\1the text saved by group 1

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

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

Test String
New

Hello Colm "This is a test""\\"
"This is also an NL test"
'And this has  an escaped quote don\'t  in it ' Blue Boy
"This has a single quote ' but doesn\' end the quote as it started with double quotes"

"""line spanning with escaped quote at the end of a line"""

""""

"Foo Bar" "Another Value" something else

Substitution
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Subbed

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
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