Question

得到这个数组：

var arr =  [
      {
        series: [
          {
            "name": 2014,
            "data": [19, 17, 15, 12, 10, 10, 12, 10, 11, 14, 14, 18]
          },
          {
            "name": 2015,
            "data": [18, 17, 16, 12, 10, 7, 6, 8, 8, 11, 15, 30]
          },
        ]
      },
      {
        series: [
          {
            "name": 2014,
            "data": [32, 17, 15, 12, 33 10, 33, 10, 11, 14, 14, 18]
          },
          {
            "name": 2015,
            "data": [45, 10, 12, 55, 77, 7, 6, 8, 8, 11, 33, 30]
          },
        ]
      },
    ]

我需要创建一个返回汇总系列的函数：

var series = [
  {
    year: '2014',
    data: [51, 34....],
  },
  {
    year: '2015',
    data: [63, 27....],
  }
]

我可以循环来执行此操作，但我想有一些聪明的方法可以使用下划线？可能具有reduce功能。有关如何做到这一点的任何想法？

Answer 1

another_df

Answer 2

您可以使用一些迭代和一个对象作为分组年份的参考。

var arr = [{ series: [{ "name": 2014, "data": [19, 17, 15, 12, 10, 10, 12, 10, 11, 14, 14, 18] }, { "name": 2015, "data": [18, 17, 16, 12, 10, 7, 6, 8, 8, 11, 15, 30] }] }, { series: [{ "name": 2014, "data": [32, 17, 15, 12, 33, 10, 33, 10, 11, 14, 14, 18] }, { "name": 2015, "data": [45, 10, 12, 55, 77, 7, 6, 8, 8, 11, 33, 30] }] }],
    series = [];
 
arr.forEach(function (a) {
    Object.keys(a).forEach(function (k) {
        a[k].forEach(function (b) {
            if (!this[b.name]) {
                this[b.name] = { year: b.name, data: [] };
                series.push(this[b.name]);
            }
            b.data.forEach(function (c, i) {
                this[b.name].data[i] = (this[b.name].data[i] || 0) + c;
            }, this);
        }, this);
    }, this);
}, {});
 
document.write('<pre>' + JSON.stringify(series, 0, 4) + '</pre>');

汇总数组值，下划线

2 个答案: