Global regex with multiple matches, where the separator should be shared in several matches

Question

First of all, sorry for the unclear title, it's hard to describe (and to find an existing solution for the same reason).

I use this regex in Javascript, to collect numbers in a string :

/(?:^|[^\d])([\d]+)(?:$|[^\d])/g

Executing it on "5358..2145" returns 2 matches, where the submatches are "5358" and "2145"

But if I use it on "5358.2145", I receive only 1 match : "5358"

So, I understand it so :

• The first match is found ("5358.") so the point goes in the first match
• What I want as second match is not preceded with start of string or the point because this point already belongs to the first match

How can I change my pattern to find all numbers separated with 1 non-number character ?

Answer 1

Use a negative lookahead at the end:

/(?:^|\D)(\d+)(?!\d)/g

See the regex demo

The pattern matches:

• (?:^|\D) - either start of string (^) or any non-digit char (\D)
• (\d+) - Group 1: one or more digits
• (?!\d) - the negative lookahead failing the match if there is a digit immediately to the right of the current location.