基于d3js中的键添加值和合并json对象

Question

当我执行console.log（variable1）时，我有一个看起来像这样的变量。

    0: {node01: "site05", amount: 1010}
    1: {node01: "site02", amount: 1200}
    2: {node01: "site08", amount: 880}
    3: {node01: "site04", amount: 870}
    4: {node01: "site01", amount: 650}
    5: {node01: "site06", amount: 1370}
    6: {node01: "site07", amount: 100}
    7: {node01: "site09", amount: 210}
    8: {node01: "site10", amount: 340}

另一个在console.log（variable2）中看起来像这样的变量：

    0: {node02: "site08", amount: 100}
    1: {node02: "site02", amount: 200}
    2: {node02: "site03", amount: 1050}
    3: {node02: "site07", amount: 1300}
    4: {node02: "site09", amount: 850}
    5: {node02: "site10", amount: 890}
    6: {node02: "site04", amount: 640}
    7: {node02: "site06", amount: 290}
    8: {node02: "site01", amount: 50}
    9: {node02: "site05", amount: 200}
    10: {node02: "site11", amount: 1060}

我想根据节点值添加两个变量的数量例如，“ node01”：“ site05”的数量为：1010，而“ node02”：“ site05”的数量为：200结果变量应具有“ node”：“ site05”，数量：1210。另外，variable1中不存在“ site11”。因此它应该只具有值“ node”：“ site11” amount：1060->仅来自变量2

我尝试使用两个嵌套的for循环，但这只会导致节点在一个变量中可用。我不确定如何将它们全部映射。另外，有没有只使用d3js而不使用js固有的for循环的解决方案？据我了解，D3还有其他循环方法

提前感谢

Answer 1

我认为您可能需要准备数据，然后将合并结果发送到D3。例如：

 const list1 = [
   {node01: "site05", amount: 1010},
   {node01: "site02", amount: 1200},
   {node01: "site08", amount: 880},
   {node01: "site04", amount: 870},
   {node01: "site01", amount: 650},
   {node01: "site06", amount: 1370},
   {node01: "site07", amount: 100},
   {node01: "site09", amount: 210},
   {node01: "site10", amount: 340},
];
const list2 = [
    {node02: "site08", amount: 100},
    {node02: "site02", amount: 200},
    {node02: "site03", amount: 1050},
    {node02: "site07", amount: 1300},
    {node02: "site09", amount: 850},
    {node02: "site10", amount: 890},
    {node02: "site04", amount: 640},
    {node02: "site06", amount: 290},
    {node02: "site01", amount: 50},
    {node02: "site05", amount: 200},
    {node02: "site11", amount: 1060},
];

const combinedList = [
  ...list1,
  ...list2,
];

const output = Object.values(combinedList.reduce((a, c) => {
  const node = Object.values(c).find(v => typeof v === 'string');
  a[node] = a[node] || {node, amount: 0};
  a[node].amount += c.amount;
  return a;
}, {}));

console.log(output);