Question on tables

  
for i=1, #users do
	if userEntered == users[i] then
		userNum = i
			break
	end
end

userEntered = string.lower(userEntered)

Doyle3694, on 10 October 2012 - 06:09 PM said:

I think this was from my password program, and it basically loops for as many variables there are in the table users

then it checks if the username entered is equal to variable number 1 in the table users. if that is, it will change the variable userNum to the current loop number. And then it will break the loop. if it's not equal, then it will loop again, and next loop it will take the second variable in users, because we are in the second loop. and if it's correct here it will set the current loop number to userNum and break. to make it not case sensitive, do

userEntered = string.lower(userEntered)

in the beginning. This is useful for multi acc password programs.

function readUsersAndPasswords()
   fs.makeDir("passwordFolder")
   regUser = fs.open("passwordFolder/users","a")
   regPassword = fs.open("passwordFolder/passwords","a")
   regUser.close()
   regPassword.close()
   users = {}
   passwords = {}
   userFile = fs.open("passwordFolder/users","r")
   passwordFile = fs.open("passwordFolder/passwords","r")

   lineRead = userFile.readLine()
   repeat
		  table.insert(users,lineRead)
		  lineRead = userFile.readLine()
   until lineRead == nil

   lineRead = passwordFile.readLine()
   repeat
		  table.insert(passwords,lineRead)
		  lineRead = passwordFile.readLine()
   until lineRead == nil
   passwordFile.close()
   userFile.close()
end

function readUsersAndPasswords()         				              -- declares the function
   fs.makeDir("passwordFolder")                               		      -- makes a new directory where we will put the saves
   regUser = fs.open("passwordFolder/users","a")                  -- opens a new file in appeal mode, so that if the file does not exist it will create the file. if you open a non existing file in read mode it will just be equal to nil and wont create a file
   regPassword = fs.open("passwordFolder/passwords","a")  -- same as above but with another file
   regUser.close() -- closes the file opened in appeal
   regPassword.close()                                     					  -- closes the other file opened in appeal
   users = {}                                             							   -- pretty much empties the table users
   passwords = {}											                        -- empties the table passwords
   userFile = fs.open("passwordFolder/users","r")                  -- opens the user file in read mode
   passwordFile = fs.open("passwordFolder/passwords","r")  -- opens the password file in read mode

   lineRead = userFile.readLine()										   -- reads the first line in the user file
   repeat -- Starts a repeat loop
				  table.insert(users,lineRead)                                -- inserts the line read into a new variable in the users table. Since we emptied it before it will be the first variable in this table too
				  lineRead = userFile.readLine()                            -- reads the next line for insertion.
   until lineRead == nil                                                            -- checks if the next line is equal too nil, if so, it will end the repeat loop

   lineRead = passwordFile.readLine( )                                  -- This whole thing from here to the while is just the same thing but with the password file and the passwords table
   repeat
				  table.insert(passwords,lineRead)
				  lineRead = passwordFile.readLine()
   until lineRead == nil

   passwordFile.close()														  -- closes the password file
   userFile.close()                                                                  -- closes the users file
end																					    -- ends the funciton declaration

users = {["Jeff"] = 1, ["Mary"] = 2,}

userNum = users[userEntered]
if not userNum then return end --users not on file will return nil