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xoft · (This post was last modified: 11-30-2015, 08:16 AM by xoft.)

Use a global Lua table, and use it as a dictionary:

-- Initialize the array, this should be in a file outside of any functions
-- Maps UUID -> true for all players who are currently spying
g_SpyingPlayers = {}

-- Add a player:
g_SpyingPlayers[a_Player:GetUUID()] = true

-- Remove a player:
g_SpyingPlayers[a_Player:GetUUID()] = nil

-- Do something with all players:
for _, uuid in pairs(g_SpyingPlayers) do
  cRoot:Get():DoWithPlayerByUUID(uuid,
    function (a_CBPlayer)
      a_CBPlayer:SendMessage("You are spying")
    end
  )
end  -- for uuid - g_SpyingPlayers[]