Accessing Object inside Array

问题

I'm trying to access values inside Firebase array > object.

When I try to access values inside v-for, it works well. But I cannot do this: postDetail.author. It returns undefined. What's the solution?

回答1:

Since postDetail is an array of object to access properties inside its objects, you need do something like postDetail[Index].prop

var postDetail =[{"author" : "abc", "meta" : "xyz"}];
console.log(postDetail[0].author);

回答2:

If you want get only author try it:

var postDetails = [{
  author: "John",
  category: "Tech"
}];

var inner = postDetails.map(function(e) {
  return e.autor;
});

console.log(inner);

回答3:

// Array of object
var persons = [
  {
    name: "shubham",
    age: 22,
    comments: ["Good", "Awesome"]
  },
  {
    name: "Ankit",
    age: 24,
    comments: ["Fine", "Decent"]
  },
  {
    name: "Arvind",
    age: 26,
    comments: ["Awesome", "Handsome"]
  },
  {
    name: "Ashwani",
    age: 28,
    comments: ["Very Good", "Lovely"]
  }
];

var data = persons.map(person => {
  console.log(person.name);
  console.log(person.age);
  person.comments.map((comment, index) => console.log(index + " " + comment));
});

来源：https://stackoverflow.com/questions/50822205/accessing-object-inside-array