Array Wrapper or Class...

[Heretic86]

I need a Wrapper or a Class that can control the Max Length of an Array on setting a value...  It might be possible with a Prototype too, which is fine...

let myArray = new ArrayClassThing();

myArray.setMax = 50; // should be a const value set in Constructor or Prototype

myArray[50] = "Foo";  // This should work fine, I know index starts at 0, but I am not using 0 so total of 50
myArray[51] = "Bar";  // Need to do nothing

Javascript is different than Ruby where you can use special characters to define Getter and Setter methods:

# Ruby Code
class Array_Wrapper
  def initialize
    @data = []
  end
  # Getter
  def [](id)
    if id <= 50 and @data[id]
      return @data[id]
    end
  end
  # Setter
  def []=(id,value)
    if id <= 50
      @data[id] = value
    end
  end               

As far as I understand, cant use a "[]" as a Getter or Setter Method, and I need something that can do exactly that, just to control a Static Maximum

 

Can anyone help out with this?

[requinix]

Take a look at Proxy.

[Heretic86]

Im gonna need a lot of classes and trying to keep code clean and minimal.  Proxies just make a basic class look... well, messy.

 

  What about something like this?

 

  class Game_Var {
    constructor(){
      this._data = [null];
      const _self = this;
      
      _self.__proto__.value = function(id){
        // do stuff here;
      }
    }
  }

How do I define Getters and Setters in this?  Or something similar...

Edit: Let me be clear here.  I dont want to call the property name from the outside, only the class instance and braces:

//... some class definition

var foo = new MyClass();

foo[1] = "bar";

if (foo[1] == "bar") alert("ok here");

 

Edited May 12, 2021 by Heretic86

[requinix]

Worry about "clean" and "minimal" once you have stuff that works, first.

[Heretic86]

Telling me what my priorities are isnt helping to make sure it works.  And I am not using a proxy to do something that is part of the syntactical sugar of the language.  If you dont know, say you dont know, because what you are telling me is not helping.

[requinix]

I know what the answer is. It's to wrap your Array in a Proxy. If you don't like that answer then does that mean you want to shop around until you find one you like better?

[Heretic86]

No it is not.

I am thankful for this site but your answers are not helpful, it should be part of standard class definition using syntax that I am unfamiliar with.