So, I am working on a premium code system where you can input a secret code and if the code is valid, it will reward you based on what code you have used. Pretty simple idea, however, I have some trouble with it.
I have a table with all the codes that looks something like this:
GameState.PremiumCodesTable = GameState.PremiumCodesTable or {{code = "X45", value = 30}, {code = "MM4", value = 45}, {code = "B47", value = 100}}
Basically, if the game runs for the first time, the GameState.PremiumCodesTable will be nil and it will create new element in GameState table which is this table: {{code = "X45", value = 30}, {code = "MM4", value = 45}, {code = "B47", value = 100}}
Now, when the user uses the valid code, it gets deleted from the table. Eventually the user will find all the codes, use them and the GameState.PremiumCodesTable table will be empty.
Now, I want to update the game and bring in some new codes to find. However, since the GameState.PremiumCodesTable is already empty and saved, it will always be empty.
How can I add more codes later on?
I have a solution, but I don't like it, so I am asking here. My solution is to add code by code like so:
GameState.PremiumCodesTable[1] = GameState.PremiumCodesTable[1] or {code = "X45", value = 30}
GameState.PremiumCodesTable[2] = GameState.PremiumCodesTable[2] or {code = "MM4", value = 45}
GameState.PremiumCodesTable[3] = GameState.PremiumCodesTable[3] or {code = "B47", value = 100}
and so on... However, this takes too much space, so I'd like it to have in only ONE big table like the one above.
Use the save file to store an array of code strings that have been used, then initialize PremiumCodesTable to contain full data for all of the codes. That way, the save file keeps the bare minimum amount of information, and you get maximum freedom to process the save file however you want. (You may need to store the code data in a non-array table to make it easier to access.)
GameState.usedCodes = GameState.usedCodes or {}
local PremiumCodesTable = {
{code = "X45", value = 30},
{code = "MM4", value = 45},
{code = "B47", value = 100}
}
Related
Im trying to add pictured menu ,but it gives me error.Error, .lua
function loadPlayerInventory()
TBCore.Functions.TriggerServerCallback('tb-inventory:server:getPlayerInventory', function(data)
items =
inventory = data.inventory
weapons = data.weapons
local weight = 0
if inventory ~= nil then
for k, v in pairs(inventory) do
table.insert(items, inventory[k])
weight = weight + (inventory[k].amount * inventory[k].weight)
end
items =
should give you an error "unexpected symbol near = So you should not even get to that point that your callback is called.
You forgot to assign a value to items. Your code suggests that it should be a table.
The error in the screenshot is caused by indexing data, a local nil value.
inventory = data.inventory
This is because your callback is called but no parameter data is given. Find out why or make sure you don't index it if it is nil.
Something like
if data then
inventory = data.inventory
end
or
inventory = data and data.inventory
for example
I want to parse a config file which has information like:
[MY_WINDOW_0]
Address = 0xA0B0C0D0
Size = 0x100
Type = cpu0
[MY_WINDOW_1]
Address = 0xB0C0D0A0
Size = 0x200
Type = cpu0
[MY_WINDOW_2]
Address = 0xC0D0A0B0
Size = 0x100
Type = cpu1
into a LUA table as follows
CPU_TRACE_WINDOWS =
{
["cpu0"] = {{address = 0xA0B0C0D0, size = 0x100},{address = 0xB0C0D0A0, size = 0x200},}
["cpu1"] = {{address = 0xC0D0A0B0, size = 0x100},...}
}
I tried my best with some basic LUA string manipulation functions but couldn't get the output that I'm looking for due to repetition of strings in each sections like 'Address',' Size', 'Type' etc. Also my actual config file is huge with 20 such sections.
I got so far, this is basically one section of the code, rest would be just repetition of the logic.
OriginalConfigFile = "test.cfg"
os.execute("cls")
CPU_TRACE_WINDOWS = {}
local bus
for line in io.lines(OriginalConfigFile) do
if string.find(line, "Type") ~= nil then
bus = string.gsub(line, "%a=%a", "")
k,v = string.match(bus, "(%w+) = (%w+)")
table.insert(CPU_TRACE_WINDOWS, v)
end
end
Basically I'm having trouble with coming up with the FINAL TABLE STRUCTURE that I need. v here is the different rvalues of the string "Type". I'm having issues with arranging it in the table. I'm currently working to find a solution but I thought I could ask for help meanwhile.
This should work for you. Just change the filename to wherever you have your config file stored.
f, Address, Size, Type = io.input("configfile"), "", "", ""
CPU_TRACE_WINDOWS = {}
for line in f:lines() do
if line:find("MY_WINDOW") then
Type = ""
Address = ""
Size = ""
elseif line:find("=") then
_G[line:match("^%a+")] = line:match("[%d%a]+$")
if line:match("Type") then
if not CPU_TRACE_WINDOWS[Type] then
CPU_TRACE_WINDOWS[Type] = {}
end
table.insert(CPU_TRACE_WINDOWS[Type], {address = Address, size = Size})
end
end
end
end
It searches for the MY_WINDOW phrase and resets the variable. If the table exists within CPU_TRACE_WINDOWS, then it just appends a new table value, otherwise it just creates it. Note that this is dependent upon Type always being the last entry. If it switches up anywhere, then it will not have all the required information. There may be a cleaner way to do it, but this works (tested on my end).
Edit: Whoops, forgot to change the variables in the middle there if MY_WINDOW matched. That needed to be corrected.
Edit 2: Cleaned up the redundancy with table.insert. Only need it once, just need to make sure the table is created first.
This is my first attempt to use Lua tables and I'm getting on with it quite well. I'm struggling with one thing though, heres (a small sample of) my table as it currently stands:
objects = {
["1/1/1"] = { tl = 1, startVal = 1, stopVal = 0 },
["1/1/2"] = { tl = 11, startVal = 1, stopVal = 0 },
["1/1/3"] = { tl = 22, startVal = 1, stopVal = 0 },
["1/1/4"] = { tl = 33, startVal = 1, stopVal = 0 },
}
The typical operation of this is that I use the "1/1/1" values as a lookup to the inner tables and then use those values in various functions. This all works well. Now, I need to go the other way, say I have tl = 22 coming in, I want to return the top value ("1/1/3" in this case).
I think I need to do something with the inpairs I keep seeing on the web but I'm struggling to implement. Any help would be massively appreciated.
You can't use ipairs because your table is an associated array not a sequence, so you have to use pairs. Also, there is no search function builtin to Lua, so you have to loop over all items yourself, looking for the right field value:
function findTL(tbl)
for key, data in pairs(tbl) do
if data.tl == tlSearch then
return key
end
end
end
local key = findTL(objects, 22)
If you want something a tad more object-oriented you could do this:
objects.findTL = findTL -- ok because first arg is the table to search
local key = objects:findTL(22)
isn't it better to take the value directly?
objects.1/1/1.tl
I don't know if it will work also with slashes, but if not, you may replace it by 'x' for example. Then it will be:
objects.1x1x1.tl
How would I code a function to iterate through one "pages" worth of data? Sample code would be ideal...
So say we image the size of a page is 5 items. If we had a lua table with 18 items it would need to print out:
Page 1: 1 to 5
Page 2: 6 to 10
Page 3: 11 to 15
Page 4: 16 to 18
So assume the data is something like:
local data = {}
data["dog"] = {1,2,3}
data["cat"] = {1,2,3}
data["mouse"] = {1,2,3}
data["pig"] = {1,2,3}
.
.
.
How would one code the function that would do the equivalent of this:
function printPage (myTable, pageSize, pageNum)
-- find items in "myTable"
end
So in fact I'm not even sure if a Lua table used as a dictionary can even do this? There is no specific ordering is there in such a table, so how would you be sure the order would be the same when you come back to print page 2?
The next function allows you to go through a table in an order (albeit an unpredictable one). For example:
data = { dog = "Ralf", cat = "Tiddles", fish = "Joey", tortoise = "Fred" }
function printPage(t, size, start)
local i = 0
local nextKey, nextVal = start
while i < size and nextKey ~= nil do
nextKey, nextVal = next(t, nextKey)
print(nextKey .. " = " .. nextVal)
i = i + 1
end
return nextKey
end
local nextPage = printPage(data, 2) -- Print the first page
printPage(data, 2, nextPage) -- Print the second page
I know this isn't quite in the form you were after, but I'm sure it can be adapted quite easily.
The next function returns the key after the one provided in the table, along with its value. When the end of the table is reached, it returns nil. If you provide nil as the second parameter, it returns the first key and value in the table. It's also documented in Corona, although it appears to be identical.
What I'm currently trying to do is make a table of email addresses (as keys) that hold person_records (as values). Where the person_record holds 6 or so things in it. The problem I'm getting is that when I try to assign the email address as a key to a table it complains and says table index is nil... This is what I have so far:
random_record = split(line, ",")
person_record = {first_name = random_record[1], last_name = random_record[2], email_address = random_record[3], street_address = random_record[4], city = random_record[5], state = random_record[6]}
email_table[person_record.email_address] = person_record
I wrote my own split function that basically takes a line of input and pulls out the 6 comma seperated values and stores them in a table (random_record)
I get an error when I try to say email_table[person_record.email_address] = person_record.
But when I print out person_record.email_address it's NOT nil, it prints out the string I stored in it.. I'm so confused.
function split(str, pat)
local t = {} -- NOTE: use {n = 0} in Lua-5.0
local fpat = "(.-)" .. pat
local last_end = 1
local s, e, cap = str:find(fpat, 1)
while s do
if s ~= 1 or cap ~= "" then
table.insert(t,cap)
end
last_end = e+1
s, e, cap = str:find(fpat, last_end)
end
if last_end <= #str then
cap = str:sub(last_end)
table.insert(t, cap)
end
return t
end
The following code is copy and pasted from your example and runs just fine:
email_table = {}
random_record = {"first", "second", "third"}
person_record = {first_name = random_record[1], last_name = random_record[1], email_address = random_record[1]}
email_table[person_record.email_address] = person_record
So your problem is in your split function.
BTW, Lua doesn't have "hashtables". It simply has "tables" which store key/value pairs. Whether these happen to use hashes or not is an implementation detail.
It looks like you iterating over some lines that have comma-separated data.
Looking at your split function, it stops as soon as there's no more separator (,) symbols in particular line to find. So feeding it anything with less than 3 ,-separated fields (for very common example: an empty line at end of file) will produce a table that doesn't go up to [3]. Addressing any empty table value will return you a nil, so person_record.email_address will be set to nil as well on the 2nd line of your code. Then, when you attempt to use this nil stored in person_record.email_address as an index to email_table in 3rd line, you will get the exact error you've mentioned.