关于javascript:数组中子元素通过某个相同字段将子元素中相同的字段放入一个对象内且子元素中的子数组完成合并

案例如下

let list = [
    {
      defineCode: "001",
      defineName: "分级名称 1",
      gradeType: "分级类型 1",
      orgVos: [
        {
          orgCode: "组织编码 1",
          orgName: "组织名称 1",
        },
      ],
    },
    {
      defineCode: "001",
      defineName: "分级名称 1",
      gradeType: "分级类型 1",
      orgVos: [
        {
          orgCode: "组织编码 2",
          orgName: "组织名称 2",
        },
      ],
    },
    {
      defineCode: "002",
      defineName: "分级名称 2",
      gradeType: "分级类型 2",
      orgVos: [
        {
          orgCode: "组织编码 2",
          orgName: "组织名称 2",
        },
      ],
    },
  ];

  const mergedList = list.reduce((acc, curr) => {const existingItem = acc.find(item => item.defineName === curr.defineName);
    if (existingItem) {existingItem.orgVos = [...existingItem.orgVos, ...curr.orgVos];
    } else {acc.push(curr);
    }
    return acc;
  }, []);
  console.log(mergedList)

打印内容如下