[英]How to get Array inside Array data to another array in angular 7
我有一個帶有數組的json數據集,我想從該數據集中檢索數據到另一個數組。
這是我的json數據
[
{
"user": [
{
"userActivityId": "08d66e8f-0f2f-3162-4d1d-b0307df0b532",
"userId": "08d65df8-5a1c-4879-b8b6-f583bafa8084",
"userName": "Dorothy",
"photoUrl": "08d65df8-5a1c-d841-cff6-444e72fa08f2",
"createdOn": "2018-12-31T01:13:23.363154",
"itemType": 0,
"itemId": "08d66e8f-0f2f-2efa-db7a-ab313ff89e7c"
},
{
"userActivityId": "08d66e8f-19cf-7c9c-1e07-00c9e7c37fc0",
"userId": "08d65df8-5a1c-4879-b8b6-f583bafa8084",
"userName": "Dorothy",
"photoUrl": "08d65df8-5a1c-d841-cff6-444e72fa08f2",
"createdOn": "2018-12-31T01:13:41.190886",
"itemType": 1,
"itemId": "08d66e8f-19cf-a711-47a1-9690d9f6bf5e"
}
]
},
{
"user": [
{
"userActivityId": "08d66e3f-61e0-55db-f57d-5d434738d366",
"userId": "08d6630e-325b-3474-5b5c-3c07af8063b8",
"userName": "Supun",
"photoUrl": "1",
"createdOn": "2018-12-30T15:43:02.314203",
"itemType": 0,
"itemId": "08d66e3f-61df-c79d-dac4-f16f1142d526"
}
]
}
]
我想做的是,我想將此數據集放入用戶數組值中,成為單個數組。
這是我遵循的方式
friendsStufs: any[];
this.userService.getFriendsStufs(this.authService.currentUser.id).subscribe(data => {
data.forEach(user => {
user.forEach(stufs => {
this.friendsStufs.push(stufs);
});
});
}, error => {
console.log(error);
this.alertify.error('Can retrieve friends stufs');
});
您可以使用array#reduce
在單個數組中累積所有用戶對象。
let data = [ { "user": [ { "userActivityId": "08d66e8f-0f2f-3162-4d1d-b0307df0b532", "userId": "08d65df8-5a1c-4879-b8b6-f583bafa8084", "userName": "Dorothy", "photoUrl": "08d65df8-5a1c-d841-cff6-444e72fa08f2", "createdOn": "2018-12-31T01:13:23.363154", "itemType": 0, "itemId": "08d66e8f-0f2f-2efa-db7a-ab313ff89e7c" }, { "userActivityId": "08d66e8f-19cf-7c9c-1e07-00c9e7c37fc0", "userId": "08d65df8-5a1c-4879-b8b6-f583bafa8084", "userName": "Dorothy", "photoUrl": "08d65df8-5a1c-d841-cff6-444e72fa08f2", "createdOn": "2018-12-31T01:13:41.190886", "itemType": 1, "itemId": "08d66e8f-19cf-a711-47a1-9690d9f6bf5e" } ] }, { "user": [ { "userActivityId": "08d66e3f-61e0-55db-f57d-5d434738d366", "userId": "08d6630e-325b-3474-5b5c-3c07af8063b8", "userName": "Supun", "photoUrl": "1", "createdOn": "2018-12-30T15:43:02.314203", "itemType": 0, "itemId": "08d66e3f-61df-c79d-dac4-f16f1142d526" } ] } ], result = data.reduce((r,{user}) => { user.forEach(o => r.push({...o})); return r; },[]); console.log(result);
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