Sending last 30 lines of a Lua Table

[Yuri6037]

Hi all,

So, I'm still on the development of my GameMode, and again I got a problem optimizing the logs view system.

So like said in the title it's again a lua table related problem. Seriously, Lua table are for me a pain to use. Why don't they add any Matrix instead of their tables ? That's so far more simple to have matrix. Working with matrix is so much fun and easy...

Also basicaly, like said in the title I made a function to retrieve last lines of a table.

//This is part of the GameGlobal library of RealisticRoleplay
//It's added automaticaly by the GameMode library engine (at the Pre Startup event of the GameMode)
//At the end of the file of this part, there's a DefineLibrary(LIB_TBL, LIB_NAME) which tells the GameMode to load that as library, so like I already told you, do not care about how it's loaded.
//The only thing you need to care is this function.
//The call context of this function is in the rpsa_concommands defines of the GameMode's rrpadmin module. You haven't to take care of the rrpadmin module, it defines just how administration is done.
util.AddNetworkString("RealisticRoleplay_AdminLogsRetreiver")
function GameGlobal:SendLogsToClient(Player, lastLines) //The parameter lastLines is equal to 30, when this function is being called by the GameMode's rrpadmin module.
	if (!AcceptLogSend) then return end
	if (IsValid(Player) and Player:IsSuperAdmin()) then
		if (lastLines == nil or lastLines < 0) then
                        //Old un-optimized way of sending logs which will crash right after about 500 lines of logs...
			net.Start("RealisticRoleplay_AdminLogsRetreiver")
				net.WriteTable(logs)
			net.Send(Player)
		else
                        //Instead of sending the whole table, we should just send the last few moments of the game-play.
			local sendTbl = {} //The table that will be sent using net.WriteTable
			for i = #logs, lastLines, -1 do //Broken code start
				table.insert(sendTbl, logs[i])
			end //Broken code end
			net.Start("RealisticRoleplay_AdminLogsRetreiver")
				net.WriteTable(sendTbl) //It works, but instead sends 10 lines of logs, taken from random location in the big log table... 
			net.Send(Player)			
		end
	end
end

Thanks by advance,
In the hope of a quick answer,
Yuri6037.

[Mijyuoon]

If I understood you correctly then you want something like this:

Sender side:

local function sendLastN(tbl, n)
    net.WriteUInt(n, 8)
    for i = #tbl-n, #tbl do
        net.WriteType(tbl[i])
    end
end

-- USAGE EXAMPLE:
local sometable = {1,2,3,4,5,6}
net.Start("messagename")
sendLastN(sometable, 3) -- send last 3 entries
net.Broadcast() -- Send/SendToServer/whatever

Receiver side:

local function recvLastN()
    local n = net.ReadUInt(8)
    local out = {}
    for i = 1, n do
        local ty = net.ReadUInt(8)
        out[#out+1] = net.ReadType(ty)
    end
    return out
end

-- USAGE EXAMPLE:
net.Receive("messagename",
function()
    local tbl = recvLastN() -- tbl now has 4,5,6
    -- do something with tbl
end)

[Yuri6037]

 for i = #tbl-n, #tbl do end

I'll try your for loop, maybe it will work as i expect.

[editline]30th March 2015[/editline]

Thank you that worked