الكائنات والمصفوفات في لغة جافا سكريبتJava Script Object vs Array

var plane = "MS";
document.write(plane);

var plane = ['MS',2001,"2250kg","white"];
document.write(plane);

var plane = {name : "MS",model : 2001,weight : "2250kg",color : "White"};
document.write(plane.name,"<br>");
document.write(plane.model);

var courses = ["HTML", "CSS", "JS"];
courses [0] = "PHP";
document.write(typeof(courses));

var courses = ["HTML", "CSS", "JS"];
document.write("<b>"+ courses[0] +"<b>");

var car = {type:"MS", model:"2001", color:"white"};
document.write("<b>"+ car.model +"<b>");

myArray[0] = Date.now;                    /* this is an object   */ 
myArray[1] = myFunction;                 /* this is a function */
myArray[2] = myCars;                        /* this is an array    */

var factory = [ 
 'cars', 
 {
 "model":"2001",
 "color": "red",
 },
 'Motorcycle' ] ;
console.log(factory);

var plane= {
  type:"MS", 
  model:2001, 
  color:"white"
}
var propertyValues=Object.values(plane);  
document.write(propertyValues);

var plane= {
  type:"MS", 
  model:2001, 
  color:"white"
}
var propertyValues=Object.keys(plane);  
document.write(propertyValues);

var plane= {
  type:"MS", 
  model:2001, 
  color:"white"
}
var propertyValues=Object.entries(plane);  
document.write(propertyValues);

var courses = ["HTML", "CSS", "JS"];
var obj = {...courses};
console.log(obj);

var courses = ["HTML", "CSS", "JS"];
var obj = Object.assign({},courses);
console.log(obj);