How to make json response available within the same ts file

Hi

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams, AlertController } from 'ionic-angular';
import { AnimeService } from '../../app/services/anime.service';

@IonicPage()
@Component({
  selector: 'page-anime-by-season',
  templateUrl: 'anime-by-season.html',
})
export class AnimeBySeasonPage {

  animes: any;
  seasons: any;
  testRadioOpen: boolean;
  statusRadioResult;

  constructor(public navCtrl: NavController, public navParams: NavParams, public alertCtrl: AlertController, private animeService:AnimeService) {
    console.log('constructor');
    this.getSeasons();
  }

  ngOnInit(){
    console.log('ngOnInit');
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad');

    let someArray = this.seasons;

    for (let entry of someArray) {
        console.log(entry);
    }

  }



  getSeasons(){
    console.log('getSeasons');
      this.animeService.getSeasons().subscribe(response => {
          this.seasons = response;
          console.log("Success : "+this.seasons);
      });
  }

}

this is my code. My problem is that the variable seasons has undefined value even when the method getSeasons is invoked.. I would like to access data stored in seasons vairable within the same .ts file.. I can access it inside html file but in ts file I cannot.

Hope you can help me
Thank you