如何在javascript中迭代数组中对象的键值对

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

for (let i = 0; i < arr.length; i++) {
  for (let key in arr[i]) {
    console.log(key + ': ' + arr[i][key]);
  }
}

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

arr.forEach(obj => {
  Object.keys(obj).forEach(key => {
    console.log(key + ': ' + obj[key]);
  });
});

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

for (let obj of arr) {
  for (let [key, value] of Object.entries(obj)) {
    console.log(key + ': ' + value);
  }
}