此關鍵字匿名函數內部/構造

Question

在一定程度上我知道什麼在代碼中發生的事情，只是爲了澄清我的懷疑我已經發布了這個問題

的JavaScript

Point = function (x, y)  //Here anonymous constructor is define 
{ 
    this.x = x; 
    this.y = y; 
} 

var points=[] 
points.push(new Point(centerX + radius * Math.sin(angle),centerY - radius * Math.cos(angle))); //object is created and push in the array 

以及訪問點的值數組，我可以寫點[i] .x？

Answer 1

是的，看看這個

var Point = function (x, y)  //Here anonymous constructor is define 
{ 
    this.x = x; 
    this.y = y; 
} 

var points = []; 
points.push(new Point(2,5)); 
points.push(new Point(3,11)); 
points.push(new Point(9,1)); 

for(var i = 0; i <points.length; i++){ 
console.log(points[i].x); 
console.log(points[i].y); 
}; 

Answer 2

正確的，你可以使用它的索引我訪問的對象，那麼你就提領該對象來訪問它的屬性/成員

var Point = function (x, y) 
{ 
    this.x = x; 
    this.y = y; 
} 

var points = []; 
points.push(new Point(1, 2)); 
var point = points[0]; 
alert(point.x == point[0].x);