Regex get value between parentheses

Question

I have a line like: 10 lessons (40h 25m) and I need to get the duration value and duration unit between parentheses using two regexps. 1st regex to get dur. value and second for unit.

Example:

1. 10 lessons (40h 25m) - get 40 and h
2. 2 lessons (50m) - get 50 and m
3. 25 lessons (3d 10h 23m) - get 3 and d

Note:

I can't use one regex for this purpose. My JSON structure:

{
  "duration": {
    "unit": {
      "regex": "<regex>"
      //props..
    },
    "value": {
      "regex": "<regex>"
      //props..
    }
  }
}

EDIT: I used regexp2 engine for getting the functionality of lookarounds.

Answer 1

You may try the below regex's to get your requirements:

(?<=\()\d+ --> to get the duration
(?<=\(\d+)[a-zA-Z] --> to get the units

Explanation of the above regex:

(?<=\()\d+ - Represents positive look behind matching one or more digit just before a ( .

[a-zA-Z] - Represents a single character which is just followed by ( along with one or more digits.

You can find the demo of the above regexes in here and here.