javascript - 无法在 json 数组对象迭代中获得所需或类似的输出？

Question

我有以下 json 对象，我想获得如下所示的所需输出。

var testdata = [{
        "x": [
            "Jan-10",
            "Feb-10",
            "Mar-10",
            "Apr-10",
            "May-10"
        ],
        "y": [
            "100.0",
            "25.0",
            "100.0",
            "60.0",
            "500.0"
        ],
        "xf": "Jan-10",
        "xl": "May-10",
        "yf": "100.0",
        "yl": "500.0",
        "xtitle": "day",
        "ytitle": "rs"
    },
    {
        "x": [
            "Jan-11",
            "Feb-11",
            "Mar-11",
            "Apr-11",
            "May-11"
        ],
        "y": [
            "450.0",
            "650.0",
            "300.0",
            "70.0",
            "360.0"
        ],
        "xf": "Jan-11",
        "xl": "May-11",
        "yf": "450.0",
        "yl": "360.0",
        "xtitle": "day",
        "ytitle": "rs"
    }
];

我想迭代这个，应该得到类似的输出(y1和y2只是它们的值，这些键可以是任何东西):

[{
        "day": "Jan",
        "y1": "100",
        "y2": "450"
    },
    {
        "day": "Feb",
        "y1": "25",
        "y2": "650"
    },
    {
        "day": "Mar",
        "y1": "100",
        "y2": "300"
    },
    {
        "day": "Apr",
        "y1": "60",
        "y2": "70"
    },
    {
        "day": "May",
        "y1": "500",
        "y2": "360"
    }
]

我尝试过:

if(testdata.length > 0){
         var outarr = [];
          for(var i = 0; i < testdata[0].x.length; i++) {
            outarr.push(
            {
            "x": testdata[0].x[i],
            "y": testdata[0].y[i]
            })
            }
        console.log(JSON.stringify(outarr));
}

但我没有从上面的循环中获得实际输出，请让我知道如何执行此操作以获得类似的输出。创建Fiddle 。提前致谢!

Answer 1

假设testdata的结构是一致的。

var testdata = [{
        "x": [
            "Jan-10",
            "Feb-10",
            "Mar-10",
            "Apr-10",
            "May-10"
        ],
        "y": [
            "100.0",
            "25.0",
            "100.0",
            "60.0",
            "500.0"
        ],
        "xf": "Jan-10",
        "xl": "May-10",
        "yf": "100.0",
        "yl": "500.0",
        "xtitle": "day",
        "ytitle": "rs"
    },
    {
        "x": [
            "Jan-11",
            "Feb-11",
            "Mar-11",
            "Apr-11",
            "May-11"
        ],
        "y": [
            "450.0",
            "650.0",
            "300.0",
            "70.0",
            "360.0"
        ],
        "xf": "Jan-11",
        "xl": "May-11",
        "yf": "450.0",
        "yl": "360.0",
        "xtitle": "day",
        "ytitle": "rs"
    }
];

if(testdata){
    months = testdata[0]['x'];


    output = [];
    for(var i = 0; i < months.length; i++){
        month = months[i].split('-')[0]
        output.push({
            "month" : month,
            "y1"    : testdata[0]['y'][i],
            "y2"    : testdata[1]['y'][i]
        });
    }

    console.log(output)
}

如果您有两个以上的条目，您当然可以考虑这一点:

if(testdata){
    months = testdata[0]['x'];
    numentries = testdata.length;

    output = [];
    for(var i = 0; i < months.length; i++){
        month = months[i].split('-')[0]

        monthData = {
            "month" : month
        }

        for(var x = 0; x < numentries; x++){
            monthData['y'+x] = testdata[x]['y'][i]
        }

        output.push(monthData);
    }

    console.log(output)
}