How to insert some values into a table?

[12p]

Well, I wanna make a Undo system.

I'll explain how it works:

I create a global elements table.

For every player, I create a sub-table.

When a player creates an element, that element is being inserted into the player's table.

Then, when the player triggers the Undo action, the element is removed from the player's table and destroyed.

Easy, isn't it?

Well, the problem is that I cannot insert elements into tables. I thought it was possible.

I don't have any other idea to do it. How to?

[Aibo]

well it is possible. you're doing something wrong then.

[BinSlayer1]

getElementsByType() always returns a table of elements.. so it is possible to add elements to tables

I suggest you use table.insert(table, element)

http://pgl.yoyo.org/luai/i/table.insert

[Castillo]

local myTable = {} 
  
addCommandHandler("insert", 
function (player) 
     if not myTable[player] then myTable[player] = {} end 
     table.insert(myTable[player], createObject(980, 0, 0, 0)) 
end) 
  
addCommandHandler("get", 
function (player) 
    for index, ob in pairs(myTable[player]) do 
        local x, y, z = getElementPosition(ob) 
        outputChatBox(tostring(x) ..", ".. tostring(y) ..", ".. tostring(z)) 
    end 
end) 

That should work.

[12p]

Okay. Here is the code I use.

GLOBAL_ELEMENTS_TABLE = { } 
function getPlayerElementsTable ( p ) return GLOBAL_ELEMENTS_TABLE[p] end 
  
addEventHandler ( "onPlayerCreateElement", getRootElement ( ), 
function ( ele, id, x, y, z, r, keep, weapon ) 
    local thetable = getPlayerElementsTable ( source ) 
    outputChatBox ( type ( thetable ) ) 
    if ele == "vehicle" then 
        local v = createVehicle ( id, x, y, z ) 
        setVehicleRotation ( v, 0, 0, r ) 
        if table.insert ( thetable, v ) then outputChatBox ( "Element Vehicle was added to "..getPlayerName ( source ) .. "'s table" ) end 
    elseif ele == "object" then 
        local obj = createObject ( id, x, y, z ) 
        setElementRotation ( obj, 0, 0, r ) 
        table.insert ( thetable, obj  ) 
    elseif ele == "ped" then 
        local ped = createPed ( id, x, y, z ) 
        setElementRotation ( ped, 0, 0, r ) 
        if getWeaponNameFromID ( weapon ) then giveWeapon ( ped, weapon, 999999, true ) end 
        table.insert ( thetable, ped ) 
    end 
end ) 

Everything works fine; the element is created, the table is created, but someway it doesn't insert the element into the table.

Edited October 25, 2011 by Guest

[Aibo]

are you sure vehicle is created?

you never define GLOBAL_ELEMENTS_TABLE[p] as a table, so it cant insert anything there obviously:

function getPlayerElementsTable ( p )  
  if type(GLOBAL_ELEMENTS_TABLE[p]) ~= "table" then GLOBAL_ELEMENTS_TABLE[p] = {} end 
  return GLOBAL_ELEMENTS_TABLE[p]  
end 
  

[12p]

If the vehicle is not created, I speak asgtyhythyhdf's language.

So, yep. I see the vehicle created and some of my friends who test the script, also see it.

EDIT: @Aibo, here is other part of my code:

function resetConfig ( p ) 
    dettachElementFromPlayer ( p ) 
    GLOBAL_ELEMENTS_TABLE[p] = { } 
    --More things but doesn't matter 
end 
  
addEventHandler ( "onPlayerJoin", getRootElement ( ), function ( ) resetConfig ( source ) end ) 
for i, p in ipairs ( getElementsByType ( "player" ) ) do resetConfig ( p ) end 
  

[Aibo]

well then your problem is that table.insert doesn't return anything. try #thetable after insert and see.

[12p]

Again, I DON'T KNOW WHAT THE HELL I CHANGED BUT NOW IS WORKING.

OMG THERE MUST BE SOMETHING WRONG WITH ME

Thank you guys for trying to help me.