對象，原型繼承和失敗函數

Question

嘗試轉向某些中級/高級Javascript概念時，遇到了問題。在下面的代碼中，對象原型和創建的對象似乎運行良好。但是，當我嘗試在函數'優勝者'中使用它們時，無論其得分如何，結果總是宣告勝利者爲第二個參數。在這裏，邁克的得分（395）高於彼得（206），應該被宣佈爲獲勝者。此外，控制檯正在記錄消息「彼得贏得功能分數（）{ return（this.age * 5）+ this.height; }」。

任何幫助瞭解我做錯了什麼將不勝感激。

var player = { 
 
    name: 'Default', 
 
    age: 'Default', 
 
    height: 'Default', 
 
    score: function() { 
 
     return (this.age * 5) + this.height; 
 
    } 
 
} 
 
    
 
var Mike = Object.create(player); 
 
Mike.name = 'Mike'; 
 
Mike.age = 67; 
 
Mike.height = 60; 
 

 

 
var Peter = Object.create(player); 
 
Peter.name = 'Peter'; 
 
Peter.age = 30; 
 
Peter.height = 56; 
 

 

 
var winner = function(player1, player2) { 
 
    var player1score = player1.score; 
 
    var player2score = player2.score; 
 
    
 
    if(player1score > player2score) { 
 
     console.log(player1.name + ' wins with a score of ' + player1.score); 
 
    } else { 
 
     console.log(player2.name + ' wins with a score of ' + player2.score); 
 
    } 
 
} 
 

 
winner(Mike, Peter); 
 
winner(Peter, Mike);

Answer 1

更換

var player1score = player1.score; 
var player2score = player2.score; 

與

var player1score = player1.score(); 
var player2score = player2.score(); 

你要調用的函數，如果你只寫player1.score你會得到函數體。