let arr1 = [
{
id: 1,
book: [
{
bookid: 1,
state: 0,
},
{
bookid: 2,
state: 0,
},
{
bookid: 3,
state: 0,
},
{
bookid: 4,
state: 0,
},
],
},
{
id: 2,
book: [
{
bookid: 1,
state: 0,
},
{
bookid: 2,
state: 0,
},
{
bookid: 3,
state: 0,
},
{
bookid: 4,
state: 0,
},
],
},
{
id: 3,
book: [
{
bookid: 1,
state: 0,
},
{
bookid: 2,
state: 0,
},
{
bookid: 3,
state: 0,
},
{
bookid: 4,
state: 0,
},
],
},
];
let arr2 = [
{
pageId: 1,
numId: 2,
state: 1,
},
{
pageId: 1,
numId: 3,
state: 1,
},
{
pageId: 1,
numId: 1,
state: 0,
},
{
pageId: 1,
numId: 7,
state: 1,
},
{
pageId: 2,
numId: 1,
state: 1,
},
];
arr1和arr2 两个数组
根据需求(arr1的id对应arr2的pageId,arr1的bookid对应arr2的numId)把arr2 数组中符合条件的state值写入arr1 里
比如 arr1 里的第一条中 (arr1[0].id 和 arr1[0].book[2].bookid )的id分别是1和3
对应arr2 的就是 arr2[1]的 pageId: 1, numId: 3把这条的state值写入前面的数组中。