遍历对象和数组javascript / angular

Question

I am trying to iterate an object that I get in Angular but I was unable to. In order to understand that I tried it simply using below code:

<script>
var x = {"data":['A','B','C']};
for(v in x) 
{
    alert(v[0]);
}   
</script>

The output of this is "d".How can I output "A"?

Answer 1

If you use this for loop, this is the syntax:

var x = {"data":['A','B','C']};
for(var key in x) 
{
    alert(key);    //data
    alert(x[key]); //A,B,C
}   

This is plain JS though, no Angular.

You can add further if clauses to receive the first element like A , but make sure it doesn't error out on other properties of the object.

Fiddle