const usersData = [
{ "id": 0, "name": "ABC" },
{ "id": 1, "name": "XYZ" }
];
let dataList = [];
// How can I transfer the data from the user array to the dataList array?
// If I use the map function, do I need to initialize empty values for other fields in dataList?
If I want to move the user data array to dataList array how can I do that?
If I use map function then do I need to initialize empty data for other fields for dataList?
The map method in JavaScript returns an array, making it easy to transform data:
const dataList = user.map((x: any) => ({
id: x.id,
name: x.name,
address:...
// add more properties here
}));
When working in "strict mode", you can specify only certain properties to include and use type casting:
const dataList = user.map((x: any) => ({
id: x.id,
name: x.name,
address:...
// include specific properties
} as { id: number, name: string,
address: string , pin: string,
comment: string});
Utilize interfaces for type checking:
export interface DataModel {
id: number;
name: string;
address: string;
pin: string;
comment: string;
}
const dataList: DataModel[] = user.map((x: any) => ({
id: x.id,
name: x.name,
} as DataModel));
An alternative approach without using the map method:
const data = [];
for (let i = 0; i < user.length; i++) {
data.push({
id: user[i].id,
name: user[i].name
});
}
return data;
Absolutely, initializing empty data is essential.
Check out this straightforward example.
let employee: { id: number, name: string }[] = [
{ "id": 0, "name": "John Doe" },
{ "id": 1, "name": "Jane Smith" }
];
let empDataList: { id: number, name: string, department: string, position: string, salary: number }[] = employee.map(emp => {
return {
id: emp.id,
name: emp.name,
department: "",
position: "",
salary: 0
};
});
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