Question

我坚持使用for循环结构。我需要获取一个对象数组的属性名称，但我只是获取数组名称而不是属性。有人帮助我。

let employes = [
  {
    name: 'iagor',
    age: 22,
    role: 'front-end developer'
  },
  {
    name: 'jasiel',
    age: 21,
    role: 'illustrator'
  },
  {
    name: 'davi',
    age: 32,
    role: 'movie maker'
  }
];

for (let employe in employes) {
  console.log(`${Object.keys(employes[0])}: ${employes[employe].name}`);
  console.log(`${Object.keys(employes[0])}: ${employes[employe].age}`);
  console.log(`${Object.keys(employes[0])}: ${employes[employe].role}\n`);
}

输出：

name,age,role: iagor
name,age,role: 22
name,age,role: front-end developer

Answer 1

你必须首先遍历数组。你可以这样试试。

for (let employe of employes) {
  for (let key in employe) {
    console.log (key, employe[key]);
  }
  console.log ('\n');
}

Answer 2

您必须首先遍历数组。由于数组中的每个元素都是一个对象，您可以使用object.keys来获取项的属性和值

检查此代码段

let employes = [{
  name: 'iagor',
  age: 22,
  role: 'front-end developer'
}, {
  name: 'jasiel',
  age: 21,
  role: 'illustrator'
}, {
  name: 'davi',
  age: 32,
  role: 'movie maker'
}];
employes.forEach(function(employee) {

  Object.keys(employee).forEach(function(item) {
     console.log(item+":" + employee[item]);
    
  });
});

希望这有帮助

Answer 3

employes.forEach((employ) => {
  Object.keys(employ).forEach((propName) => {
    console.log(`${propName}: ${employ[propName]}`)
  });
});

试图在javascript中使用for ...获取属性名称的值

3 个答案: