Array cannot read property

Question

This is the problem

This is the script

var data = [];

axios.get('https://jsonplaceholder.typicode.com/posts')
    .then(function (response) {
        data.push(response.data['0'])
    })
    .catch(function (error) {
        console.log(error);
    });
console.log(data);
console.log(data['0'].body); //this is where I get the error

As you can see in the picture it should be correct but why I cannot read the property ?

Colin Ricardo · Answer 1 · 2018-06-16T15:34:28.360

0

Are you sure the data object is filled when you try access it?

Does the following work?

var data = [];

axios.get('https://jsonplaceholder.typicode.com/posts')
    .then(function (response) {
        data.push(response.data['0'])
        console.log(data['0'].body);
    })
    .catch(function (error) {
        console.log(error);
    });

edited Jun 16 '18 at 15:34

answered Jun 16 '18 at 15:28

Colin Ricardo

16,488
11
47
80

I still got the error I tried that but still got wrong. Bdw Jonas W. is correct it was both equal. – Pure Rhymer Organization Jun 16 '18 at 15:31
With arrays, non-negative integers are indexes and keys (strings) that are non-negative integers will be treated as indexes. So, while this advice seems to resolve a problem accessing the array item, it really doesn't. – Scott Marcus Jun 16 '18 at 15:31
@JonasW. didn't know that, thanks! Updated answer. – Colin Ricardo Jun 16 '18 at 15:34
It does console.log the exact value but why it doesnt print the value outside of axios? – Pure Rhymer Organization Jun 16 '18 at 15:39
1

Please see the linked duplicate answer. – Colin Ricardo Jun 16 '18 at 15:43
@Colin, what is **axios**? – Jun 16 '18 at 15:54
1

@Rahul https://github.com/axios/axios – Colin Ricardo Jun 16 '18 at 16:01

score -1 · Answer 2 · answered Jun 16 '18 at 15:31

-1

Your data is an array, so it must be accessed with integer like data[0].body.

String accessor might be useful for Object type, not array. For example, you can also do data[0][“body”].

answered Jun 16 '18 at 15:31

Joshua Stephen

196
1
8

Wrong. `[1]["0"]` will return `1` – Jonas Wilms Jun 16 '18 at 15:36
Property names are always strings (unless they are Symbols, but these aren't). `foo[0]` and `foo['0']` are completely equivalent. – Quentin Jun 16 '18 at 15:42

Array cannot read property

2 Answers2