Change JSON structure to send in API post request - json

Question

I am making an API POST call in Angular 8. I have to send a JSON object in the call which should be of structure:
-{}JSON
-{}data
-[]exp
+{} 0
+{} 1
but I am sending data in this format:
-[]JSON
+{} 0
+{} 1
in my typescript I am getting two objects {}0, {}1 in array called: receivedData then I am storing the data like:
this.changedData = this.receivedData;
this.postService.postMethod(this.headers, this.changedData)
in my postService:
postMethod(header, changedData): Observable<any[]> {
return this.http.post<any>(`the url here`, changedData, {headers: header, responseType: 'text' as 'json'})
.pipe(map(response => {
return response;
}))
}
how to send data in the mentioned format? I want the json structure of changedDetails to be as mentioned on the top with the same naming convention like: {}data and []exp How can I push receivedData objects into exp[] which I can then send into data{} which will then be entirely pushed into changedDetails {}

Answer 1

Just so we're on the same page, I'm imagining you're receiving data with the following shape:
[ { ... }, { ... } ]
And you want to transform it to this shape:
{
data: {
exp: [ { ... }, { ... } ]
}
}
(Let me know if this is not the case.)
If this is correct, than the transformation is quite straightfoward: simply create a new object literal like so:
this.changedData = {
data: {
exp: this.receivedData,
},
};