Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=(?:[^\/]*\/){4,})

Non-Capturing Group(?:[^\/]*\/){4,}

{4,}repeats the group contents below at least 4 times:

Negated Character Class[^\/]*

*matches any number of characters outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1(.*)

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

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

^(?=(?:[^\/]*\/){4,})(.*)

New

http://localhost:2000/machine/my-test-machine/3
http://localhost:2000/my-test-machine

http://localhost:2000/machine/my-test-machine/3
http://localhost:2000/my-test-machine