I din't get proper answer on the internet. I may be asking wrong question. Here is my code:

filtersTree: any[];


if (...) {
  this.myService.myMethodOne().subscribe(data => {
    this.filtersTree = data;
    });
  }
else {
  this.myService.myMethodTwo().subscribe(data => {
    this.filtersTree = data.filters;
  });
}

See data inside subscribe. Every time this code is called the previous values stays there and the whole UI is flooded with stale values along with new values.

I want to clear it before the next call is made. Please help.