[Strategy Pattern with TypeScript] After Implementation #blog #typescript

avengers.ts

abstract class Hero {
  constructor(public name: string, public weapon?: string) {}
  
  abstract attack(): void;
}

class BlastingHero extends Hero {
  attack() {
    console.log(`${this.name} blasted ${this.weapon}.`);
  }
}

class ShootingHero extends Hero {
  attack() {
    console.log(`${this.name} shot ${this.weapon}.`);
  }
}

class ThrowingHero extends Hero {
  attack() {
    console.log(`${this.name} threw ${this.weapon}.`);
  }
}

class UnarmedHero extends Hero {
  attack() {
    console.log(`${this.name} kicked and punched.`);
  }
}

class Avengers {
  private ensemble: Hero[] = [];
  
  recruit(hero: Hero) {
    this.ensemble = this.ensemble
      .filter(({name}) => name === hero.name)
    	.concat(hero);
  }
  
  fight() {
    this.ensemble.forEach(hero => hero.attack());
  }
}