Javascript Array of Objects

function Point(x,y) { 
   this.x = x; /* w  ww  . j  a  v  a  2s.co  m*/
   this.y = y; 
} 

function displayPts(arr) { 
   for (let i = 0; i < arr.length; ++i) { 
      console.log(arr[i].x + ", " + arr[i].y); 
   } 
} 

let p1 = new Point(1,2); 
let p2 = new Point(3,5); 
let p3 = new Point(2,8); 
let p4 = new Point(4,4); 
let points = [p1,p2,p3,p4]; 
for (let i = 0; i < points.length; ++i) { 
   console.log("Point " + parseInt(i+1) + ": " + points[i].x + ", " + 
         points[i].y); 
} 
let p5 = new Point(12,-3); 
points.push(p5); 
console.log("After push: "); 
displayPts(points); 
points.shift(); 
console.log("After shift: "); 
displayPts(points);