从 JSON 格式填充 JavaScript 数组

Question

您好，我有 JSON 如下所示的数据：

[
  {"Mean of Arrivals for each hour":
     {"03-04":-35.62,"04-05":-3.62,"05-06":-3.7}
  }
]

我想将它推送到一个数组，并使该数组看起来像这样：

[
{x: 03-04 y: -35.62},
{x: 04-05, y: -3.62},
{x: 05-06, y: -3.7}
]

现在，它看起来像下面的数组，我不知道如何将它格式化为上面的样子。下面也是我用来填充数组的代码。希望获得有关如何格式化数组的帮助。

[
x: {03-04: -35.62, 04-05: -3.62, 05-06: -3.7},
y: {03-04: -35.62, 04-05: -3.62, 05-06: -3.7}
]

var dataPoints = []; // final array with data

var chartData = new google.visualization.DataTable();
chartData.addColumn('string', 'Stunde');
chartData.addColumn('number', 'Ankunft');

function addData(data) {
    for (var i = 0; i < data.length - 1; i++) {
        dataPoints.push({
          x: data[i]["Mean of Arrivals for each hour"],
          y: data[i]["Mean of Arrivals for each hour"]
         });
    }

    dataPoints.forEach(function (row) {
        chartData.addRow([row.x, row.y]);
    });

    console.log(dataPoints);
    var chart = new google.charts.Bar(document.getElementById('plot3'));
    chart.draw(chartData, google.charts.Bar.convertOptions(options));
};

$.getJSON(url, addData);

Answer 1

这会将所有内容展平为单个数据数组，然后通过 map() 处理对象。它将在对象内容纳任意数量的数组，以及这些数组内的任意数量的坐标集。

let obj = [
  {"Mean of Arrivals for each hour":
     {"03-04":-35.62,"04-05":-3.62,"05-06":-3.7}
  }
]

let result = obj.map(Object.values).flat().map(Object.entries).flat().map(e => ({x:e[0], y:e[1]}))
console.log(result)

Answer 2

使用 for...in 循环遍历属性，构造 JSON 并推送到数组：

const data = [
  {"Mean of Arrivals for each hour":
     {"03-04":-35.62,"04-05":-3.62,"05-06":-3.7}
  }
]
const result = [], r = data[0]["Mean of Arrivals for each hour"];

for(const key in r) result.push({x: key, y: r[key]})

console.log(result);

Answer 3

迭代数组中子对象的 Object.entries() 并为每个条目创建一个新对象

const data = [
  {"Mean of Arrivals for each hour":
     {"03-04":-35.62,"04-05":-3.62,"05-06":-3.7}
  }
]

const key = "Mean of Arrivals for each hour",
      res = [];

data.forEach(o => Object.entries(o[key]).forEach(([x, y]) => res.push({x, y})))

console.log(res)

从 JSON 格式填充 JavaScript 数组

Populate JavaScript Array from JSON Format

javascript

arrays

charts

google-visualization

react-google-charts