console.clear()

const characters = [

  'Harry Potter',

  'Ron Weasly',

  'Hermione Granger',

  'Nevel Longbottom',

  'Lavender Brown',

  'Scabbers',

  'Pigwidgeon',

]

const handler = {

  // target: the array itself

  // name: the index which passed in

 get(target, name) {

   // check whether index is 0,1...6

   if(name in target) {

     // if yes, then get the value back

     return Reflect.get(target, name)

   } else {

     // if not, then the name is -1, -2, -3...

     const index = Number(name);

     return Reflect.get(target, target.length + index)

   }

 }

}

const proxy = new Proxy(characters, handler)

console.log(proxy[]); // Nevel Longbottom

console.log(proxy[]); // Harry Potter

console.log(proxy[-]); // Scabbers