Regular Expressions 101

Pro

base/the literal text base/ (case sensitive)

Non-Capturing Group(?:.+/)?

?repeats the group contents below at most once:

.+any Unicode character (except for line terminators), repeated at least once

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([^/\n]+/?)

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\na line-feed (newline) character (ASCII 10)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

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

base/(?:.+/)?([^/\n]+/?)

base/aa/bb
base/dir
base/a/b/c/d/ee