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function getArmor(index)
  local armor = game.players[index].get_inventory(defines.inventory.player_armor)[1]
  return armor
end

function armorCheck(index)
  local armor = getArmor(index)
  if armor.grid ~= nil then
    return true
  end
  return false
end

script.on_event(defines.events.on_player_armor_inventory_changed, function(event)
  local index = event.player_index
  if armorCheck(index) then
    local armor = getArmor(index)
    local equipment = armor.grid.equipment
    for i, e in ipairs(equipment) do
      if e.name == "hoverboard" then
        activateEquipment(index)
      end
    end
  else
    deactivateEquipment(index)
  end
end)

Code: Select all

Error while running event on_player_armor_inventory_changed (ID 35)
LuaItemStack API call when LuaItemStack was invalid.
stack traceback:
	__MagneticFloor__/src/armor.lua:8: in function 'armorCheck'
	__MagneticFloor__/src/armor.lua:16: in function <__MagneticFloor__/src/armor.lua:14>