Cache suggestions

[loff93]

Hello!

Example of my code:

local Immerseus_LFR = {
	[1] = 104922; -- Hood of swirling senses
}

Immerseus = {
	 [1] = {unpack(Immerseus_LFR)};
}

Siege_Of_Orgrimmar = {
	[1] = {name = "Immerseus", unpack(Immerseus)};
}

When I click show items, it will go through the list and spawn the item name etc, but when the item isn't cached it won't show up. Currently I don't have a good way that refreshes/grabs all the items it's going to show.
Any suggestions/tips on how to solve this?
I can't have the addon caching every table when you login because it will be too many tables & data in the end (I assume), so a better way would be:
When you click the "raid". Cache the items -> show items.
Or
Have a "Grab Items" button that you click when you want to use the addon maybe(?)

Have used this for single items earlier but not quite sure how to tweak it for the best solution. I might find a good solution once I know the best way to deal with cache in this situation.
Not that experienced with LUA.

local wait = {}
local cache_writer = CreateFrame('Frame')
cache_writer:RegisterEvent('GET_ITEM_INFO_RECEIVED')
cache_writer:SetScript('OnEvent', function(self, event, ...)
    if event == 'GET_ITEM_INFO_RECEIVED' then
        -- the info is now downloaded and cached
        local itemID = ...
		local name = GetItemInfo(itemID) 
        if wait[itemID] then
			-- do something when ID is recieved
            wait[itemID] = nil
			end
    end
end)

Function to show items:

 function CreateItemList(Instance, Difficulty, newFrame)

[Banknorris]

http://www.wowinterface.com/forums/s...ad.php?t=55352

[loff93]

Originally Posted by Banknorris http://www.wowinterface.com/forums/s...ad.php?t=55352

Yes, I have read it ofcourse since it's my own thread from April and I have a solution in mind for my current project as written above - but a general answer on whats recommended for my project would be greatly appreciated. I can make things work etc, but I want the addon to be clean, low memory usage etc and I don't feel like I have a very good solution - but it might just be me overthinking it.
Can do my best and share the result, and get some input.

[Kakjens]

I am using a check

if wait == {} then
updatevisibility()
end

to see when all items are ready. I remember it failed sometimes but couldn't reproduce after clearing the cache.

[loff93]

Originally Posted by Kakjens I am using a check if wait == {} then updatevisibility() end to see when all items are ready. I remember it failed sometimes but couldn't reproduce after clearing the cache.

Cool, thanks for the input

[Banknorris]

Originally Posted by Kakjens I am using a check if wait == {} then updatevisibility() end to see when all items are ready. I remember it failed sometimes but couldn't reproduce after clearing the cache.

I am pretty sure

wait=={}

is always false
just test

local a={}
if a=={} then
    print("Bank Norris is wrong")
else
    print("Bank Norris is correct")
end

[SDPhantom]

Explaining why, {}=={} is not doing anything special to compare values in tables. What it does is create two completely different tables and compare their pointers. Since they are exactly two different tables, their pointers are different and this results in false. If you want to check if the table is empty, the most basic way is to call next(wait) and see if it returns nil.