Regular Expressions 101

log-the literal text log- (case sensitive)

Group 1((?!wuble-wamwam|monkey).*?)

Negative Lookahead(?!wuble-wamwam|monkey)

1st Alternativewuble-wamwam

wuble-wamwamthe literal text wuble-wamwam (case sensitive)

2nd Alternativemonkey

monkeythe literal text monkey (case sensitive)

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

log-((?!wuble-wamwam|monkey).*?)-[0-9]{4}\.[0-9]{2}

log-widget-alpha-2017.01
log-doodad-wubwub-2017.01
log-widget-alpha-2017.02
log-doodad-wubwub-2017.02
log-wuble-wamwam-2017.01
log-monkey-2017.01