text: /**
   * 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".
   */
  function getCommonCharacterCount(s1, s2) {
    const o1 = {};
    let common = 0;
    s1.split('').forEach((c) => {
      o1[c] = (o1[c] || 0) + 1;
    });
    s2.split('').forEach((c) => {
      if (o1[c] || 0) {
        common++;
        o1[c]--;
      }
    });
    return common;
  }
  
  module.exports = getCommonCharacterCount;
  