Question

I have a string like this: (((foo)))

I would like to get an object from the string like this: {"text":"foo", "brackets" : 3}

How is it possible?

Answer 1

It isn’t necessarily the best solution, but a regular expression to match multiple ( with (\(+), followed by everything up to ) with ([^)]+), followed by multiple ) with (\)+) is pretty easy. This will allow you to validate that the parentheses are balanced before you build your object.

var s = '(((foo)))';
var parts = s.match(/^(\(+)([^)]+)(\)+)$/);
// ["(((foo)))", "(((", "foo", ")))"]

// If the start and end match, preventing something like `(((foo)` with unbalanced ()
// and the total length of the extracted array is 4
if (parts.length === 4 && parts[1].length === parts[3].length) {
  // Your result is:
  var yourResultObj = {
    "text": parts[2],
    "brackets": parts[1].length
  }
}

All of this can also be done with string maipulation, but the regex code may be clearer to read.