js数组值合并

Question

两个数组合并
原数据

(6) [{…}, {…}, {…}, {…}, {…}, {…}]  （**第一个数组**）
0: {grand: 8}
1: {grand: 7}
2: {grand: 0}
3: {grand: 0}
4: {grand: 0}
5: {grand: 0}

(6) [{…}, {…}, {…}, {…}, {…}, {…}]  （**第二个数组**）
0: {id: 1，
    exportContent: Array(3)
    0: {content: "男", grand: "75%", percent: "75%", resultCount: "6%", validPercent: "75%"}
    1: {content: "女", grand: "100%", percent: "25%", resultCount: "2%", validPercent: "25%"}
    2: {content: "合计", grand: "", percent: "100%", resultCount: "100%", validPercent: "100%"}
},
1: {id: 1，
    exportContent: Array(3)
    0: {content: "男", grand: "75%", percent: "75%", resultCount: "6%", validPercent: "75%"}
    1: {content: "女", grand: "100%", percent: "25%", resultCount: "2%", validPercent: "25%"}
    2: {content: "合计", grand: "", percent: "100%", resultCount: "100%", validPercent: "100%"}
}
...

期望得到：

(6) [{…}, {…}, {…}, {…}, {…}, {…}]
0: {id: 1，
    exportContent: Array(3)
    0: {content: "男", grand: "75%", percent: "75%", resultCount: "6%", validPercent: "75%"}
    1: {content: "女", grand: "100%", percent: "25%", resultCount: "2%", validPercent: "25%"}
    2: {content: "合计", grand: "8", percent: "100%", resultCount: "100%", validPercent: "100%"}
},
1: {id: 1，
    exportContent: Array(3)
    0: {content: "男", grand: "75%", percent: "75%", resultCount: "6%", validPercent: "75%"}
    1: {content: "女", grand: "100%", percent: "25%", resultCount: "2%", validPercent: "25%"}
    2: {content: "合计", grand: "7", percent: "100%", resultCount: "100%", validPercent: "100%"}
}

我想把第一个数组中的grand 值赋值到第二个数组exportContent数组中的grand ，请大佬们帮看看

Answer 1

const arr3 = arr2.map((o, index) => {
  o.exportContent[2].grand = arr1[index].grand
  return o
})

这都要问，建议转行