Technical test - (SKK MIGAS) Satuan Kerja Khusus Pelaksana Kegiatan Usaha Hulu Minyak dan Gas Bumi

sortLetters.js

function sortLetters(words) {
  let joinArray = words.join("");

  let wordAppear = {};

  for (let char of joinArray) {
    wordAppear[char] = (wordAppear[char] || 0) + 1;
  }

  let appearArray = Object.entries(wordAppear);

  appearArray.sort((a, b) => {
    if (b[1] !== a[1]) {
      return b[1] - a[1];
    } else {
      if (a[0] === a[0].toUpperCase() && b[0] === b[0].toLowerCase()) {
        return -1;
      } else if (a[0] === a[0].toLowerCase() && b[0] === b[0].toUpperCase()) {
        return 1;
      } else {
        return a[0].localeCompare(b[0]);
      }
    }
  });

  return appearArray.map((entry) => entry[0]).join("");
}

let input1 = ["Abc", "bCd"];
console.log(sortLetters(input1));

let input2 = ["Oke", "One"];
console.log(sortLetters(input2));

let input3 = ["Pendanaan", "Terproteksi", "Untuk", "Dampak", "Berarti"];
console.log(sortLetters(input3));