Regular Expressions 101

Non-Capturing Group(?:^|[[:punct:]]| )

1st Alternative^

^start of line

2nd Alternative[[:punct:]]

Character Class[[:punct:]]

[:punct:]a punctuation character [!"#$%&'()*+,\-./:;<=>?@[\]^_`{|}~]

3rd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

lesthe literal text les (case sensitive)

Non-Capturing Group(?:[[:punct:]]| |$)

1st Alternative[[:punct:]]

Character Class[[:punct:]]

[:punct:]a punctuation character [!"#$%&'()*+,\-./:;<=>?@[\]^_`{|}~]

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

3rd Alternative$

$end of line

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

(?:^|[[:punct:]]| )les(?:[[:punct:]]| |$)

Test String
New

les < I need match
lesík < NO
za-les-nit < I need match
les'ns < I need match
odlesnit < NO
useless < NO
doles < NO
kolem je les, který ... < I need match

Regular Expression

Test StringNew

Test String
New