Typescript Array.filter empty return

Question

Problem statement

I've got problem with an object array I would like to get a sub object array from based on a object property. But via the Array.filter(lambda{}) all I get is an empty list.

The object is like:

export interface objectType1 {
   someName: number;
   someOtherName: string;
}

export interface ObjectType2 {
   name: string;
   other: string;
   ObjectType1: [];
}

The method to get the subArray is:

private getSubArray(toDivied: ObjectType2[], propertyValue: string){
   let list: ObjectType2[] = toDivied.filter((row:ObjectType2) => {
     row.name === propertyValue
   });

   return list;
}

Analys

Namely two things been done ensure filter comparing works and that the data is "as expected".

Brekepoints in visual studio code

Via break points in the return and filter compareison I've inspected that the property value exists (by conditions on the break point) and that the "list" which is returned is empty.

I would like to point out that I use a Typescript linter which usally gives warning for the wrong types and undefined variable calls and such so I am quite sure it shouldn't be an syntax problem.

Tested via javascript if it works in chrome console

Answer 1

remove braces inside callback function

private getSubArray(toDivied: ObjectType2[], propertyValue: string){
   let list: ObjectType2[] = toDivied.filter((row:ObjectType2) => 
     row.name === propertyValue
   );

   return list;
}