map out an object's properties || delete an object property

How to map an object's properties

const info = {
  name: 'liu',
  age: 23,
  sex: 'man',
}

// 方法一
Object.keys(info).map(item => {
  console.log(item)   // 属性
  console.log(info[item])   // 值
})

// 方法二
for (var item in info) {
  console.log(item)
  console.log(info[item])
}

How to delete object attributes

let obj = {
  name: 'liu',
  age: 23,
  sex: 'man',
}

delete obj.age  // 删除 属性 age