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JavaScript Practice Object Interaction The Rough Plan Solution: Building Constructor Methods

Doron Geyer
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.a{fill-rule:evenodd;}techdegree
Doron Geyer
Full Stack JavaScript Techdegree Student 13,897 Points
Posted by Doron Geyer
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Doron Geyer
Full Stack JavaScript Techdegree Student 13,897 Points

quick question on what would be the better method here.

in the exercise the constructor for the patron class specifies that it should be 

class Patron{
  constructor(name,email){
    this.name = name;
    this.email = email;
    this.currentBook = null;
  }
  checkout(){};
  returnBook(){};
};

would it not make more sense to have an argument which can pass in the current book but if none is give it instead defaults to null like this? 

class Patron{
  constructor(name,email,currentBook= null){
    this.name = name;
    this.email = email;
    this.currentBook = currentBook;
  }
  checkout(){};
  returnBook(){};
};

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

It depends on whether the system is being created for a new library or replacing an old one in an existing library.

If patrons are added as they receive their borrowing privileges in a new library, then by definition they would never already have a "currentbook" to register.

But if this system was replacing an older one, then yes, it would be handy when creating records for existing patrons to add their current book as the record is created.

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

Doron Geyer — Glad to help. You can mark a question solved by choosing a "best answer".
And happy coding!