Regex for given parameters

Question

I recently had test with regex, but I am not skilled in it. I try to write something for pattern:

I wrote somethin like this "(^[a-zA-Z]).(/w{6,16}).*(?<!-)$", ofcourse it is not correct and not full.

I am very interesting in correct answear with explanaition, you could downvote my question if you think, it shoud be.

@WiktorStribiżew yaaaap seems correct. I will try to learn more about regex — Anton A.
– Anton A., Commented Oct 10, 2018 at 20:06

Wiktor Stribiżew · Accepted Answer · 2018-10-10 20:09:07Z

1

You may use

^[a-zA-Z](?=.{5,15}$)[^-]*(?:-[^-]+)?$

Details

^ - start of string
[a-zA-Z] - an ASCII letter
(?=.{5,15}$) - a positive lookahead requiring 5 to 15 chars up to the string end from the current position
[^-]* - (a negated character class) 0+ chars other than -
(?:-[^-]+)? - an optional non-capturing group that matches 1 or 0 repetitions of
- - - a hyphen
- [^-]+ - 1+ chars other than -
$ - end of string

answered Oct 10, 2018 at 20:09

Wiktor Stribiżew

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