count - ngFor length in Angular 5

Question

I have three buttons :

All (Reals+ Fakes), Reals(total count), Fakes(total count)

I am trying to get the total count of my total feeds which will be shown in All.

And the total count of feed.feed_type != '' which will be shown Reals.

And the total count of feed.feed_type == '' which will be shown Fakes.

Feeds Model

export class Feeds {
  feed_id: string;
  feed_category: string;
  feed_title: any;
  feed_description: string;
  feed_terms: string;
  feed_type: string;
  checked: false;
  }

Answer 1

As per your comments, to retrieve the count of Feed_A and Feed_B, you can make use of Array#filter and Array#length:

const feedACount = feeds.filter(feed => feed.feed_type !== '').length;
const feedBCount = feeds.length - feedACount;