JavaScript:为什么array.push()追加两个对象而不是一个对象

Question

我是JS的新手，我的代码有一个我真的不明白的问题:我试图将一个文本-值对附加到一个数组中，基本上它可以工作，但它没有附加单个对，而是附加了两个对。下面是代码片段，问题出在后面的if语句中。我已经在代码片段上添加了注释，以解释我正在做什么。

 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);

所以问题是JS是如何获得Greg的名字的--我已经检查过playerVal变量，它实际上只包含Bill的名字。我们热诚欢迎您的帮助！

Answer 1

控制台中显示的来自console.log的输出是活动的。它反映了在发生console.log调用之后传递给console.log的对象的更改。

您可能希望在将对象传递给console.log之前执行JSON.stringify操作，或者创建数组的副本：

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