Regular Expressions 101

^start of line

Group 1(\d+\.\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Positive Lookahead(?=(?:.(?!\d\.\d))*TEST)

Non-Capturing Group(?:.(?!\d\.\d))*

*repeats the group contents below any number of times:

.any character

Negative Lookahead(?!\d\.\d)

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da digit

TESTthe literal text TEST (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

s modifier: single line. Allows a dot to match line terminators

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(\d+\.\d+)(?=(?:.(?!\d\.\d))*TEST)

New

asdasdasda
2.1 adasdasdasdasdwvwetwevtwtv
wetvwetv TEST wqrqwvrqw
qwvrqwvqwr
2.2 whergtvwe
wetvwetvwetveatw
evtwet
2.3 eyrnenytunrunert
vqevrerwv TEST aevtawtvwetv

Regular Expression

Extraction