CODEWITHSUNDEEP
angulartypescriptrxjsobservable
Strider
Strider

Reputation: 3739

Observable merge runs with TypeError: cannot read property 'apply' of undefined

I am trying to implement a sort DataTable in an angular application, and the example I am implementing runs with the following error:

ERROR TypeError: Cannot read property 'apply' of undefined
    at TableDataSource.webpackJsonp.332.TableDataSource.connect (data-table.component.ts:83)

The method that causes the error is the Observable.merge():

connect(): Observable<UserData[]> {
    const displayDataChanges = [
      this._exampleDatabase.dataChange, //BehaviorSubbject
      this._sort.sortChange, //EventEmitter
    ];

    return Observable.merge(...displayDataChanges).map(() => {
      return this.getSortedData();
    });
}

Do you have any idea about the cause of this error? I googled for an explanation of the message that I am getting but with no success

Upvotes: 1

Views: 2807

Answers (1)

Strider
Strider

Reputation: 3739

I just found the cause of the problem: I had to import the merge!

import 'rxjs/add/observable/merge';

I paid attention to this by reading the answer to https://stackoverflow.com/questions/36585491/typescript-rxjs-observable-array-concat .

Upvotes: 5

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