text: var Stack = function() {
  	var data = [];
  
  	this.push = function(file) {
  		data.push(file);
  	}
  
  	this.pop = function() {
  		if(this.length() == 0) return false;
  
  		return data.pop();
  	}
  
  	this.peek = function() {
  		if(this.length() == 0) return false;
  
  		return data[this.length()-1];
  	}
  
  	this.length = function() {
  		return data.length;
  	}
  
  	this.empty = function() {
  		return this.length() == 0;
  	}
  }