Answers for "are array in js object"

Javascript is object array

var colors=["red","green","blue"];

if(Array.isArray(colors)){
    //colors is an array
}

array or object javascript

To remember the difference, you can think of "is a / has a" 

let fruits = [
  orange, 
  mango, 
  banana
];
// Every item in the array "fruits" is a fruit. 

let fruit = {
  seed:{}, 
  endocarp:{}, 
  flesh:{}
};
// The object fruit has every attribute inside the object.