Regex Split String Into Multiple Parts

I have the following string 133. Alarm (Peep peep) My goal is to split the string using regex into 3 parts and store it as a json object, like { 'id': '133', 'Title': 'Alarm'

Solution 1:

You can do this:

const data = '133. Alarm (Peep peep)'

const getInfo = data => {
  let [,id, title, subtitle] = data.match(/(\d+)\.\s*(.*?)\s*\((.*?)\)/)
  return { id, title, subtitle }
}

console.log(getInfo(data))

Solution 2:

Something like

let partsPattern = /(\d+)\.\s*(.*[^[:space:]])\s*\((.*)\)/

Not sure if JS can into POSIX charsets, you might want to use \s instead of [:space:] (or even the space itself if you know that there aren't any other whitespaces expected).

This should capture all the three parts inside the respective submatches (numbers 1, 2 and 3).

Solution 3:

You could use one function. exec() will return null if no matches are found, else it will return the matched string, followed by the matched groups. With id && id[1] a check is performed to not access the second element of id for when a match is not found and id === null.

The second element is used id[1] instead of id[0] because the first element will be the matched string, which will contain the dots and whitespace that helped find the match.

var str = "133. Alarm (Peep peep)";

function getData(str) {
  var id = (/(\d+)\./).exec(str);
  var title = (/\s+(.+)\s+\(/).exec(str);
  var subtitle = (/\((.+)\)/).exec(str);

  return {
    "id": id && id[1],
    "Title": title && title[1],
    "Subtitle": subtitle && subtitle[1]
  };
}

console.log(getData(str));