JavaScript：爲什麼array.push（）追加兩個對象而不是一個

Question

我對JS很新，而且我的代碼存在一個問題，我真的不明白：我嘗試將一個文本值對添加到數組，基本上它可以工作，但不是附加一對，而是附加兩對。下面是代碼片段，問題在後面的if語句中。我在片段中添加了評論，以解釋我正在做的事情。

players.addResult = function(result){ 

//result-argument contains results of games, like: Object {0: "4-2", 1: "5-3", 2: "7-1"} 


    var playerList = [];   
    var standingArray = []; 

    resultLen = Object.keys(result).length; 

    //loop iterates thru results by index 
    for (var x=0; x < resultLen; x++) { 
     var newResult = result[x]; 
     newResult = newResult.split("-"); 

     if (newResult[0] > newResult[1]) { 

      //the next line retrieves the name of a winning player from another array 
      playerVal = players.pairs[x].player1; 
      playerVal = playerVal.text; 
      console.log(playerVal); //Output of this: Bill 
      value = playerList.indexOf(playerVal); // Checks if the player already exists on the standings, returns -1 if false. 

      if (value === -1) { 

      /*if the player gets his first points, his name and earned 
      points are added on to the standingArray. And the next line of code is the 
      interesting one, because I am expecting to have an array with 
      index, name of the winner and points. Like this: 
      Object 0 name:"Bill" points:2. But instead of that, there are two     
      objects on the array, one for both players: 
      [Object] 
      0: Object 
      name: "Bill" 
      points: 2 
      __proto__: Object 
      1: Object 
      name: "Greg" 
      points: 2 
      __proto__: Object 
      length: 2 
      __proto__: Array[0]*/ 

       standingArray.push({name: playerVal, points: 2}) 

       playerList.push(playerVal); //this is for keeping on track that player is now on the standingArray 

       console.log(playerVal); 
       console.log(playerList); 
       console.log(standingArray); 
      } 
      else { 
       console.log("else"); 
      }    
     console.log(playerList); 
     console.log(standingArray); 

所以現在的問題是，JS如何獲取Greg的名字 - 我已經檢查了playerVal變量，它真的只包含比爾的名字。任何幫助熱烈歡迎！

Answer 1

從console.log出現在控制檯中的輸出仍然存在。它反映了console.log調用發生後傳遞給console.log的對象的更改。

你可能想JSON.stringify傳遞對象console.log之前，或使陣列的副本：

console.log(playerList.slice()); 
console.log(standingArray.slice());