对象属性中没有值时的数组排序

function sortArrayByProperty(arr, property) {
  arr.sort(function(a, b) {
    if (a[property] === undefined && b[property] === undefined) {
      return 0;
    }
    if (a[property] === undefined) {
      return 1;
    }
    if (b[property] === undefined) {
      return -1;
    }
    // 如果属性存在，则按照属性值进行排序
    return a[property] - b[property];
  });
}

var arr = [
  { name: 'Alice', age: 25 },
  { name: 'Bob' },
  { name: 'Charlie', age: 30 }
];

sortArrayByProperty(arr, 'age');

console.log(arr);
// 输出: [{name: 'Bob'}, {name: 'Alice', age: 25}, {name: 'Charlie', age: 30}]