Numericals of a String

Numericals of a StringCodewars

Approach

1. split each character as array

2. iterate process-1 result

   1. while iterate count character, and add character count as a string in 'result' variable

3. return result string

Solution

JavaScript

const numericals = (s) => [...s].reduce((acc, cur) => {
  acc[cur] = (acc[cur] || 0) + 1;
  acc.result += acc[cur];
  return acc;
}, { result: '' }).result;