js数组中数据相同合并数据

方法一:

function mergeSimilarItems(arr) {
  return arr.reduce((acc, current) => {
    const existingItemIndex = acc.findIndex(item => item.name === current.name);
    if (existingItemIndex >= 0) {
      // 如果已存在相同id的项,则合并数据
      acc[existingItemIndex].count += current.count;
    } else {
      // 如果不存在,直接添加到结果数组
      acc.push({ ...current });
    }
    return acc;
  }, []);
}
// 示例数据
const items = [
  { name: '张三', count: '团团'},
  { name: '李四', count: '圆圆'},
  { name: '张三', count: '恭喜'},
  { name: '李四', count: '发财'}
];
 
// 使用函数
const mergedItems = mergeSimilarItems(items);
console.log(mergedItems);
// [
    {name:'张三',count:'团团恭喜'},
    {name:'李四',count:'圆圆发财'}
  ]

方法二:

function mergeSimilarItems(arr) {
    var afterData = [];
      arr.forEach(item => {
        let flag = afterData.find(
          item1 => item1.name=== item.name
        );
        if (!flag) {
          afterData.push({
            projectName: item.projectName,
            origin: [item]
          });
        } else {
          flag.origin.push(item);
        }
      });
      console.log("afterData", afterData);
      return afterData;
}

// 示例数据
const items = [
  { name: '张三', count: '团团'},
  { name: '李四', count: '圆圆'},
  { name: '张三', count: '恭喜'},
  { name: '李四', count: '发财'}
];

// 使用函数
const mergedItems = mergeSimilarItems(items)
console.log(mergedItems);
// [
  {name:'张三',
    orgin:[
      {name:'张三',count:'团团'},
      {name:'张三',count:'恭喜'}
    ]
  },
  {name:'李四',
    orgin:[
      {name:'李四',count:'圆圆'},
      {name:'李四',count:'发财'}
    ]
  }
]

 

posted @ 2024-03-18 17:01  挽你手  阅读(748)  评论(0编辑  收藏  举报