Regular Expressions 101

Pro

Non-Capturing Group(?:.*\/)?

?repeats the group contents below at most once:

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

xxxthe literal text xxx (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negative Lookahead(?!xxx(?![^\/\n]))

xxxthe literal text xxx (case sensitive)

Negative Lookahead(?![^\/\n])

Negated Character Class[^\/\n]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Negated Character Class[^/\n]*

*matches any number of characters outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Positive Lookahead(?=$|\/)

1st Alternative$

$end of line

2nd Alternative\/

\/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.

26 tokens

Regular Expression

(?:.*\/)?xxx\/(?!xxx(?![^\/\n]))[^/\n]*(?=$|\/)

New

/a/xxx/b/c/xxx/xxx/d/e/xxx/xxx/f/g
/a/xxx/b/c/xxx/xxx/d/e/xxx/xxx/f/
/a/xxx/b/c/xxx/xxx/d/e/xxx/xxx/f
/a/xxx/b/c/xxx/xxx/d/e/xxx/xxx/f/g/xxx/xxx

/xxx/f/g
xxx/f/g
a/xxx/f/g
/a/xxx/f/g
/a/xxx/b/c/xxx/xxx/d/e/xxx/gggxxxd/f/gxxxf/