Database Index help

for i=0, count() do
   if Passwords[i] == password then
	  return 1
   else

for i=1, count() do
   if Passwords[i] == password then
	  return 1
   else

shiskebab, on 28 July 2015 - 12:29 AM said:

Okay, but it doesn't work :ph34r:/> I cannot add more than one than one door that reliably works, and sometimes not even one. Something is wrong with my datacollection or data storage and I have no idea why :rolleyes:/>

I need to know where i fail :P/>

Balthamel, on 28 July 2015 - 12:36 AM said:

If the program loses the data on a restart then it will lose the data when the chunk is unloaded. Is your base(and more importantly the computer) chunkloaded. If not then it loses all the details the second you wander too far away from the base.

local f = fs.open( "filePath" , "w" ) --# The 'w' means 'write mode'

f.write( textutils.serialize( tableName ) ) --# textutils.serialize turns a table into a string, f.write adds a string to a file.

f.close() --# Always close the file when you are done, it tells your computer that other programs can safely modify it

local f = fs.open( "filePath" , "r" ) --# 'r' is read mode

local tableName = textutils.unserialize( f.readAll() ) --# unserialize turns a string into a table, readAll() returns the entire file as a string, '\n' characters included.

f.close() --# Remember to close!

for i = 0, count() do

   if h.readAll() == Doors[i] then
	-- yay found door execute code
   elseif i = count then
   -- no door here? did we fail again?!!
	else
   -- yea probably failed again. Better write this over to a cd and then	  put an axe to it
  end
end

shiskebab, on 28 July 2015 - 10:36 PM said:

Do i call this right after i have saved something to a table? Example: calling the SaveDoor(DoorID, password) and as soon as it is finished i called the file save/file load function, and then just continue normally with the program?

shiskebab, on 28 July 2015 - 10:36 PM said:

I didn't think it mattered if the function i called was below the code block that executed it ? I thought as long as i didnt define it locally i'd be good :P/>

test()

function test()
  print("hi")
end

function test2()
  test()
end

function test()
  print("Hi")
end

test2()

shiskebab, on 28 July 2015 - 10:36 PM said:

after i add the file save/load functions. do i then look for my passwords and id's in my tables ? or in my files ? And if i have to do something like

for i = 0, count() do

   if h.readAll() == Doors[i] then
	-- yay found door execute code
   elseif i = count then
   -- no door here? did we fail again?!!
	else
   -- yea probably failed again. Better write this over to a cd and then	  put an axe to it
  end
end

this
has
several
lines

"this\nhas\nseveral\nlines"

f.readLine()

local function save()
  --# Open save file

--# Write data table to file

--# Close file
end

local function load()
  --# Open save file

  --# Read table from file, using 'textutils.unserialize()' to convert the string to a table
  doors = textutils.unserialize( f.readAll() )

--# Close file

end

function save(table, name)
dPrint("Saving file "..name)
local file = fs.open(name,"w")
file.write(textutils.serialize(table))
file.close()
end
function load(name)
dPrint("Loading file "..name)
local file = fs.open(name,"r")
local data = file.readAll()
file.close()
return textutils.unserialize(data)

shiskebab, on 29 July 2015 - 05:43 PM said:

You mentioned that I should restrict myself to one table. But how would that work. I would still need all the info. Isn't there a way to do this while retaining both tables (guess i could do just one table, but i have no idea how)

--# You wouldn't ever define the table outright like this in your code (Though the save file would look like this)

local doors = { --# You can call it whatever makes sense to you

  ["Door1Name"] = "passwordForDoor1",
  ["Door2Name"] = "passwordForDoor2"

  --# Ect

}

doors["doorName"] = "password"

doors[ "Door1" ]

if doors[ "Door3" ] then
  --# Yes, it does exist
else
  --# No, it doesn't (Or the password is nil)
end

if door["name"] then

--# is the same as

if door["name"] ~= nil then

shiskebab, on 29 July 2015 - 05:43 PM said:

function save(table, name)
dPrint("Saving file "..name)
local file = fs.open(name,"w")
file.write(textutils.serialize(table))
file.close()
end
function load(name)
dPrint("Loading file "..name)
local file = fs.open(name,"r")
local data = file.readAll()
file.close()
return textutils.unserialize(data)

Would something like this work if implemented in my code ? It would certainly make saving and loading the tables less of a hassle and more streamlined.

doors = load("filePath")

shiskebab, on 30 July 2015 - 02:17 PM said:

my approach is to make a table with the door id as the 'key' and the password as the correlating 'value'

function CheckDoorExists(DoorID)
for key,value in pairs(Doors) do
   if DoorID = key do
	-- oh man we actually, without trouble matched our data
  else
  -- oh god no... not again 
  end
end
end

function CheckDoorExists( DoorID )
  return Doors[ DoorID ]
end

shiskebab, on 31 July 2015 - 08:54 PM said:

What does that return ? does it return the key ? or value ?

I dont understand what that code specifically does :P/>

t[key] = value

value = t[key]

KingofGamesYami, on 31 July 2015 - 07:58 PM said:

function CheckDoorExists( DoorID )
  return Doors[ DoorID ]
end

shiskebab, on 31 July 2015 - 08:54 PM said:

What does that return ? does it return the key ? or value ?

local function checkDoorExists( doorID)
  return doors[ doorID ] ~= nil
end

return doors[ doorID ] ~= nil  --# The ~= operator is 'does not equal'. So its the opposite of ==

return doors[ "MyDoor" ] ~= nil

return "MyPassword" ~= nil

return true

function checkDoorExists( doorID )
   if Door[ doorID ] then
	  return true
   else
	  return false
   end
end

Doors={}
Doors[1]=true

if checkDoorExists(1) then
   print "Exists."
else
   print "Doesn't exist."
end

for i=1, #Doors do
   Doors[i]=nil
end

table.create(door, 1, true)

table.create(door, 2, true)

myTable={
   password="pass123";
   username="user123";
}

print(myTable["username"])

print(myTable.username)

shiskebab, on 05 August 2015 - 12:50 PM said:

I use table.create(Table, [key], value)
And this for table.remove(Table, key)

doors[ "doorName" ] = "pass"

doors[ "doorName" ] = nil

doors[ "doorName" ] = "pass"

function create/delete(doorName, pass)
if -- condition == met then
  doors[ doorName ] = pass
end
end

shiskebab, on 06 August 2015 - 01:50 AM said:

doors[ "doorName" ] = "pass"

I would have to manually assign "doorName" as something, and password as something, before i boot the program. How do I make it a value That the program Itself can use ?

print("Enter a key:")
local key = read()

print("Enter a value:")
local value = read()

local doors = {}

doors[ key ] = value