Javascript Regex: Match additionals based on path delimiter

Question

I'm trying to match folders/files in a repeated manner - based on the path delimiter /.

Regex:

/^(?:music|pictures)\/tom(?:(?=\/)\/([\w\-]+(?:\s+[\w\-]+)*)|$)$/gm

Explanation of the regex above:

// Match a base-directory called music/pictures
// Match if directory tom exist
// If delimiter was found, match delimiter and word-character and hypen (no spaces etc at the beginning)
// Match spaces, word-characters and hypen (no spaces etc at the end)
//If delimiter was not found, end string
//End string

Everytime the delimiter / is found (positive lookahead), it should also match the remaining conditions. It works very well except for when a subfolder hits the regex.

music/tom/foldername

music/tom/folder name

music/tom/foldername/folder2  <--- Does not match

As you can see the last path cannot be matched. How can I extend/improve the regex in order to match subfolders as well?

Regex Demo: https://regex101.com/r/oG9bC3/1

Good morning @rock321987, yes that is correct. I want to match everything after tom (except spaces at the beginning/end) and only if a delmiter was found. — Steven
– Steven, Commented Aug 6, 2016 at 2:45
see if this works..I have replace \s with space as \s matches new line — rock321987
– rock321987, Commented Aug 6, 2016 at 2:53
Solid work @rock321987! Thank you very much for your help. Please post this as an official answer if you want, so I can give you kudos. — Steven
– Steven, Commented Aug 6, 2016 at 2:56

Graham · Accepted Answer · 2017-09-24 20:58:30Z

1

You can use this regex to get what you want

^(?:music|pictures)\/tom((?:\/(?:[\w-]+(?:[ ]+[\w-]+)*))+)$

Regex Demo

NOTE

You don't need lookahead when you already know what you require as next character.
- is not required to be escaped when it is used in first/last of **character class.

edited Sep 24, 2017 at 20:58

Graham

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answered Aug 6, 2016 at 3:05

rock321987

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