Javascript - 将数组插入字典中

Question

我对 JavaScript 还很陌生，而且我似乎无法让字典等基本的东西发挥作用。

这是我的代码:

    var dictio = {};
    for(var i=0; i<2; i++)
    {
        var arra = [];
            arra.push(
            {
                x: i,
                y: i+10,
            });

        arra.forEach((element, index, array) => {
                        console.log("Iteration (X, Y): "+element.x+", "+element.y);
                    });

        if(dictio[0])
        {
            var tempo = dictio[0];
            console.log("Currently stored in the dictionary:")
            tempo.forEach((element, index, array) => {
                        console.log("(X, Y): "+element.x+", "+element.y);
                    });
            console.log("After adding arra to the dictionary:")
            tempo.push(arra);
            tempo.forEach((element, index, array) => {
                        console.log("New (X, Y): "+element.x+", "+element.y);
                    });
        }
        else
        {
            console.log("Created key+value");
            dictio[0] = arra;
        }
        console.log("********************************");
    }

输出如下所示:

:39 Iteration (X, Y): 0, 10
:57 Created key+value
:65 ********************************
:39 Iteration (X, Y): 1, 11
:45 Currently stored in the dictionary:
:47 (X, Y): 0, 10
:49 After adding arra to the dictionary:
:52 New (X, Y): 0, 10
:52 New (X, Y): undefined, undefined
:65 ********************************

但是，我希望看到 1, 11 出现在第 52 行 0,10 之后。但我反而看到未定义，未定义。你能让我知道我在这里做错了什么吗？感谢您抽出时间。

Answer 1

只需按 tempo 推送 arra 的第一个元素即可。应该可以工作

tempo.push(arra[0]);

工作演示

var dictio = {};
    for(var i=0; i<2; i++)
    {
        var arra = [];
            arra.push(
            {
                x: i,
                y: i+10,
            });

        arra.forEach((element, index, array) => {
                        console.log("Iteration (X, Y): "+element.x+", "+element.y);
                    });

        if(dictio[0])
        {
            var tempo = dictio[0];
            console.log("Currently stored in the dictionary:")
            tempo.forEach((element, index, array) => {
                        console.log("(X, Y): "+element.x+", "+element.y);
                    });
            console.log("After adding arra to the dictionary:")
            tempo.push(arra[0]);
            tempo.forEach((element, index, array) => {
                        console.log("New (X, Y): "+element.x+", "+element.y);
                    });
        }
        else
        {
            console.log("Created key+value");
            dictio[0] = arra;
        }
        console.log("********************************");
    }