Regex for matching number ranges with specific units

May 1, 2022

I need help to complete a regex pattern. I need a pattern to match a range of numbers including unit.

Examples:

The car drives 50,5 – 80 km/10min on the road.
The car drives 50,5 – 80 km / 10min on the road.
The car drives 40,5-80 km/h on the road.
The car drives 30-50 km/h on the road.
The car drives 40 – 60.8 km/ h on the road.
The car drives 40.90-60,8 km/h on the road.

I need to match the entire ranges. Good would also be (?:km/10min|km / 10min|km/h|km/ h) to simplify this part so that this does not have to be listed multiple times. So also here the blanks taken into account.

([,.\d]+)\s*(?:km/10min|km / 10min|km/h|km/ h)

https://regex101.com/r/Ey792V/1

Currently, unfortunately, only the first number is matched. Thanks in advance for the help.

>Solution :

You could make the pattern a bit more specific and optionally match whitespace chars instead of hard coding all the possible spaces variations

\b\d+(?:[.,]\d+)?(?:\s*-\s*\d+(?:[.,]\d+)?)?\s*km\s*/\s*(?:h|10min)\b

Explanation

\b A word boundary
\d+(?:[.,]\d+)? Match 1+ digits with an optional decimal part
(?: Non capture group
- \s*-\s* Match - between optional whitespace chars
- \d+(?:[.,]\d+)? Match 1+ digits with an optional decimal part
)? Close the non capture group and make it optional
\s*km\s*/\s* Match km/ surrounded with optional whitespace chars to match different variations
(?:h|10min) Match either h or 10min (Or use \d+min to match 1+ digits)
\b A word boundary