Regular Expressions 101

Pro

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Character Class[ac]

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

ssthe literal text ss (case sensitive)

$end of line

Negative Lookbehind(?<!\.ass)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

assthe literal text ass (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

Detailed match information will be displayed here automatically.

25 tokens

\.s?[ac]ss$(?<!\.ass)

New

.scss
.sass
.css
.ass

.scss
.sass
.css
.ass