Learning TypeScript 2.x - Second Edition

ninja.ts

The ninja.ts file declares a class named Ninja:

import { Weapon } from "./interfaces"; 
 
export class Ninja { 
    private _weapon: Weapon; 
    public constructor(weapon: Weapon) { 
        this._weapon = weapon; 
    } 
    public fight(fromDistance: number) { 
        return this._weapon.tryHit(fromDistance); 
    } 
}