Angular2 Sorting Pipe with Object Array

Question

How to make a sorting pipe in angular2 with an array of objects

Original Problem:

I have a TODOs list, (Todo[ ]) and I want to sort it every time I make

Answer 1

Perhaps the value todos is null at the beginning because it's loaded asynchronously using HTTP.

To prevent from such use case you could add this in your pipe:

@Pipe({
  name: "sort"
})
export class TodosSortPipe implements PipeTransform {
  transform(array: Todo[], args: any): Todo[] {
    if (array == null) {
      return null;
    }
    (...)
  }
}

Then the value todos will be received and the transform method of the pipe will be called again with this non null value...

Moreover it seems that your