通过比较两个对象数组添加丢失的对象答案

【问题标题】：Add the missing Object's by comparing Two array of object通过比较两个对象数组添加丢失的对象
【发布时间】：2023-01-05 20:08:05
【问题描述】：

我正在尝试绘制一个图表来显示品牌的年度销售额比较，下面是两个年度销售额数组。

var current_year = [
  {
    total: 12941.17,
    comapanyName: "Samsung",
    year: "2021"
  },
  {
    total: 17946.87,
    comapanyName: "Haier",
    year: "2021"
  },
  {
    total: 3832.36,
    comapanyName: "Beetel",
    year: "2021"
  },
  {
    total: 12528,
    comapanyName: "Celkon",
    year: "2021"
  }
];
var last_year = [
  {
    total: 427805.51,
    comapanyName: "Samsung",
    year: "2020"
  },
  {
    total: 77576.33,
    comapanyName: "Godrej",
    year: "2020"
  },
  {
    total: 53389.02,
    comapanyName: "Beetel",
    year: "2020"
  },
  {
    total: 100748.49,
    comapanyName: "Celkon",
    year: "2020"
  },
  {
    total: 4534.19,
    comapanyName: "FORD",
    year: "2020"
  },
  {
    total: 5.05,
    comapanyName: "Voltas",
    year: "2020"
  }
];

由于一些公司名称在各自的数组中丢失，我无法按预期绘制图表。我需要帮助将缺少的公司名称添加到相应的数组中，包括年份、名称和总数。类似于这张图https://apexcharts.com/react-chart-demos/line-charts/data-labels/

期待 -

公司“FORD”在 last_year 中存在但在 current_year 数组中缺失，在 current_year 数组中添加“FORD”对象示例 = [{total:0, comapnyName:'FORD', year:2021}]
公司“Haier”存在于 current_year 数组中但在 last_year 数组中缺失，在 last_year 数组中添加“Haier” 示例 = [{total:0, comapnyName:"Haier", year:2020}]

【问题讨论】：

标签： javascript arrays charts apexcharts

【解决方案1】：

这是一个可以帮助你的例子

var current_year = [
  {
    total: 12941.17,
    comapanyName: "Samsung",
    year: "2021"
  },
  {
    total: 17946.87,
    comapanyName: "Haier",
    year: "2021"
  },
  {
    total: 3832.36,
    comapanyName: "Beetel",
    year: "2021"
  },
  {
    total: 12528,
    comapanyName: "Celkon",
    year: "2021"
  }
];
var last_year = [
  {
    total: 427805.51,
    comapanyName: "Samsung",
    year: "2020"
  },
  {
    total: 77576.33,
    comapanyName: "Godrej",
    year: "2020"
  },
  {
    total: 53389.02,
    comapanyName: "Beetel",
    year: "2020"
  },
  {
    total: 100748.49,
    comapanyName: "Celkon",
    year: "2020"
  },
  {
    total: 4534.19,
    comapanyName: "FORD",
    year: "2020"
  },
  {
    total: 5.05,
    comapanyName: "Voltas",
    year: "2020"
  }
];

const currentYearData = {};
const missingData = {};

for (const item of current_year) {
  currentYearData[item.comapanyName] = item;
}

for (const item of last_year) {
  if (currentYearData.hasOwnProperty(item.comapanyName)) {
    // Company exists in both current_year and last_year
    currentYearData[item.comapanyName] = item;
  } else {
    // Company exists in last_year but not in current_year
    missingData[item.comapanyName] = item;
  }
}

// Add the missing company names to the respective arrays
for (const key in missingData) {
  if (!currentYearData.hasOwnProperty(key)) {
    current_year.push({ total: 0, comapnyName: key, year: 2021 });
  }
}

for (const key in currentYearData) {
  if (!missingData.hasOwnProperty(key)) {
    last_year.push({ total: 0, comapnyName: key, year: 2020 });
  }
}

console.log(current_year);
console.log(last_year);

【讨论】：