Regular Expressions 101

1st Alternative(?<=\D)(?=\d)

Positive Lookbehind(?<=\D)

\Dany character that's not a digit

Positive Lookahead(?=\d)

\da digit

2nd Alternative(?<=\d)(?=\D)

Positive Lookbehind(?<=\d)

\da digit

Positive Lookahead(?=\D)

\Dany character that's not a digit

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

(?<=\D)(?=\d)|(?<=\d)(?=\D)

Test String
New

a3:2bc/12.3\efg;123.12a:5,|i(+/-)j.
BENZENEACETIC ACID, .ALPHA.-HYDROXY-, (+/-)-, COMPD. WITH 1,3,5,7-TETRAAZATRICYCLO((3.3.1.1(SUP 3,7))DECANE (1:1)
Text
ibuprofen
ibuprofen;
ibuprofen.
ibuprofen:
ibuprofen(Ibumetin)
ibuprofen,enalapril
ibuprofen|enalapril
:ibuprofen
-ibumetin,
ibuprofen/enalapril
ibuprofen / enalapril

Regular Expression

Test StringNew

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Test String
New

Extraction
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