text: import {
    NotImplementedError
  } from '../extensions/index.js';
  
  /**
   * Given two strings, find the number of common characters between them.
   *
   * @param {String} s1
   * @param {String} s2
   * @return {Number}
   *
   * @example
   * For s1 = "aabcc" and s2 = "adcaa", the output should be 3
   * Strings have 3 common characters - 2 "a"s and 1 "c".
   */
  
  export default function getCommonCharacterCount(s1, s2) {
    const date = s2.split('');
  
    let count = 0;
    for (let item of s1) {
      if (date.includes(item)) {
        date.splice(date.indexOf(item), 1);
        count++;
      }
    }
  
    return count;
  }