text: class TaskCollection {
  	constructor(tasks=[]){
  		this.tasks=tasks;
  	}
  	log(){
  		this.tasks.forEach((task,index)=>
  			console.log(task,index)
  		);
  	}
  	prepare(){
  		this.tasks.forEach(task=>{
  			console.log(this);
  		});
  		/*
  		this.tasks.forEach(function(task){
  			console.log(this); // undefined!
  		});
  		*/
  	}
  }
  class Task{
  	toGulp(){
  		console.log('converting to Gulp');
  	}
  }
  new TaskCollection([
  	new Task, new Task, new Task
  ]).prepare();
  