codewars/stringsMix.js at main · Jkalio52/codewars · GitHub

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function mix(s1, s2) {
  // your code
  let alphabetsArr = [], arr1 = cal(s1), arr2 = cal(s2);

  for (let i in arr1) {
    if (arr2[i]) {
      arr1[i] > arr2[i] && alphabetsArr.push('1:'+i.repeat(arr1[i]))
      arr1[i] < arr2[i] && alphabetsArr.push('2:'+i.repeat(arr2[i]))
      arr1[i] == arr2[i] && alphabetsArr.push('=:'+i.repeat(arr1[i]))
    } else {
      alphabetsArr.push('1:'+i.repeat(arr1[i]))
    }
  }

  for (let i in arr2) {
       !arr1[i] && alphabetsArr.push('2:'+i.repeat(arr2[i]))
  }

  function cal(str) {
      const emptyObj = {};
      str.replace(/[^a-z]/g,'').split('').map(x => emptyObj[x] ? emptyObj[x] ++ : emptyObj[x] = 1)

      for (let i in emptyObj) {
        emptyObj[i] == 1 &&　delete emptyObj[i]
      }

    return emptyObj
  }

  return alphabetsArr.sort(function(a, b) {
    return (b.length - a.length) || (a < b ? -1 : 1);
  }).join('/')
};