Angular - Array is not shown in mat-table - html

Question

In the function, the string is split into an array. Each word gets send to the server, from there I get some information about the word back. This I save into an array. The problem I have is that if I go through the array with *ngFor in the HTML document I get all the entries back but in the mat-table, it isn't shown. I don't get an error just the data is not shown.
sendText(){
this.words=[];
this.stringArray = this.sentence.split(" ");
console.log(this.stringArray);
for(let i=0;i<this.stringArray.length ;i++){
this.httpService.sendText(this.stringArray[i]).subscribe((res) => {
this.result = res;
console.log(this.result.words);
this.b.wort = this.result.words[0].wort;
this.b.definition = this.result.words[0].definition;
this.b.wortart = this.result.words[0].wortart;
this.words.push(this.b);
this.b = this.getemptyObject();
});} console.log(this.words); this.sentence = "";}
HTML
<div *ngFor="let word of words">
{{word.wort}},{{word.definition}}, {{word.wortart}}
</div>
<table mat-table [dataSource]="words" class="mat-elevation-z8">
<!-- Word Column -->
<ng-container matColumnDef="wort">
<th mat-header-cell *matHeaderCellDef> Wort </th>
<td mat-cell *matCellDef="let word"> {{word.wort}} </td>
</ng-container>
<!-- Wortdtype Column -->
<ng-container matColumnDef="wortart">
<th mat-header-cell *matHeaderCellDef> Wortart </th>
<td mat-cell *matCellDef="let word"> {{word.wortart}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>

Answer 1

I found a solution to this question on this Reddit Thread.
According to "#spacechimp" (the person who answered the question), you need to update the entire array for the MatTable to detect the changes.
Something like this:
this.words.push(this.b);
this.words = [...this.words]; // <--- Update the whole array with its own data
Even though this is a solution, it is a rather expensive way of doing this for large arrays, so I encourage you to find other ways to optimize this.