HaxeFoundation.haxe/std/lua/_lua/_hx_tab_array.lua

local _hx_array_mt = {
  __newindex = function(t,k,v)
    local len = t.length
    t.length =  k >= len and (k + 1) or len
    rawset(t,k,v)
  end
}

local function _hx_tab_array(tab,length)
  tab.length = length
  return setmetatable(tab, _hx_array_mt)
end