js中数组怎么排序

let arr = [10, 5, 20, 15];
arr.sort(function(a, b) {
  return a - b;
});
console.log(arr); // 输出: [5, 10, 15, 20]

let arr = [10, 5, 20, 15];
arr.sort(function(a, b) {
  return b - a;
});
console.log(arr); // 输出: [20, 15, 10, 5]

let arr = ['banana', 'apple', 'cherry'];
arr.sort();
console.log(arr); // 输出: ['apple', 'banana', 'cherry']

let arr = [
  { name: 'John', age: 30 },
  { name: 'Jane', age: 25 },
  { name: 'Doe', age: 35 }
];

// 根据年龄升序排序
arr.sort(function(a, b) {
  return a.age - b.age;
});
console.log(arr);
// 输出: [{ name: 'Jane', age: 25 }, { name: 'John', age: 30 }, { name: 'Doe', age: 35 }]