仅对组合了数字、number_letters、letters_numbers和字母的数组进行排序

function sortArray(arr) {
  const numbers = [];
  const numberLetters = [];
  const lettersNumbers = [];
  const letters = [];

  // 分类
  for (let i = 0; i < arr.length; i++) {
    const element = arr[i];
    if (typeof element === 'number') {
      numbers.push(element);
    } else if (/^\d+[a-zA-Z]+$/.test(element)) {
      numberLetters.push(element);
    } else if (/^[a-zA-Z]+\d+$/.test(element)) {
      lettersNumbers.push(element);
    } else if (typeof element === 'string') {
      letters.push(element);
    }
  }

  // 排序
  numbers.sort((a, b) => a - b);
  numberLetters.sort();
  lettersNumbers.sort();
  letters.sort();

  // 合并
  const sortedArray = numbers.concat(numberLetters, lettersNumbers, letters);
  return sortedArray;
}

const array = [1, 'a2', '2a', 'b', '3c', '4', 'd5', 'e', 6];
const sortedArray = sortArray(array);
console.log(sortedArray);