#include <sourcemod>

#pragma semicolon 1
#pragma newdecls required

public Plugin myinfo = {
    name        = "",
    author      = "",
    description = "",
    version     = "0.0.0",
    url         = ""
};

methodmap NumberList < ArrayList {
    public NumberList(const int[] i_numbers, int i_nof_numbers)
    {
        ArrayList h_this = CreateArray();
        for (int i_index = 0; i_index < i_nof_numbers; i_index++)
        {
            PushArrayCell(h_this, i_numbers[i_index]);
        }
        return view_as<NumberList>(h_this);
    }

    property int m_iFirst
    {
        public get() { return GetArrayCell(this, 0); }
    }
}

methodmap NumberListModifiable < NumberList {
    public NumberListModifiable(NumberList h_existing)
    {
        return view_as<NumberListModifiable>(h_existing);
    }

    property int m_iFirst
    {
        public set(int i_first) { SetArrayCell(this, 0, i_first); }
    }
}

public void OnPluginStart()
{
    NumberList h_base_numbers = new NumberList({1, 2, 3}, 3);
    NumberListModifiable h_numbers = new NumberListModifiable(h_base_numbers);
    h_numbers.m_iFirst = h_numbers.m_iFirst + 1;
}