How would you state a person said something in a table?

Ok, so I have this little sample script

Items = {

{"Cookie","357"}
{"Torch"."16"}

}

def = io.read

if def ==–[[ blah blah blah ]] then
end

————————————————————-

How would I state that if what is typed is Items[1][1] or Items[2][2], without becoming specific like

if def == Items[1][1] then
end
if def == Items[2][2]
end
————————————————————–


I figure ipairs or inpairs would be involved but I'm not particularly sure…


Can anyone help me here?

here

for k,v in pairs(items) do
  if def==v[1] then
    --some code here
  end
end

I think in your case, you could use this:

local Items = {
["Cookie"]="357",
["Torch"]="16",
}
local def = io.read()
local itemNum = Items[def]
if itemNum then
  -- do something with that number (actually a string in you're case)
end

KaoS, on 18 November 2012 - 09:56 AM said:

here

for k,v in pairs(items) do
  if def==v[1] then
	--some code here
  end
end

So does this also mean if a person said 16 it would perform the same function as if they said torch?

Yes, you can do this like this:

items = {
cookie = 357,
torch = 16
}
term.clear() term.setCursorPos(1,1)
while true do
    term.setTextColour(colours.red) write("Name/ID: ") i = string.lower(read())
    term.setTextColour(colours.yellow)
    for k,v in pairs(items) do
        if i == k then
            print("You typed in name: " .. k .. " which has ID number of: " .. v)
            break
        elseif tonumber(i) == v then
            print("You typed in ID: " .. v .. " which is named: " .. k)
            break
        end        
    end
end

Spoiler

Well my real goal is to just simply be able to state something if I type one of the selections given in the table. Could you dumb it down a little for me seeing as that I'm completely lost?

Its like saying


If I type a table selection or its other then
give me info of that selection I typed (Which would include some type of defining function probs..)
end

If I'm reading you right, you're looking for sort of a dictionary, where the user inputs a word, and the program prints out the information on your word. That's actually pretty simple to do.

-- for this example, we will use fruits.
local definitions = {
	apples = "Red, sometimes sour, sometimes sweet, always juicy.";
	oranges = "Usually sour, really juicy. Can't really eat the skin.";
	grapes = "Like apples, but tiner. Really juicy, grow on a vine.";
}

-- just for convenience.
local function clearScreen(  )
	term.clear()
	term.setCursorPos(1,1)
end

while true do
	clearScreen()

	print 'What do you want to know about?'
	local input = read() -- this lets us know what the user typed

	clearScreen()

	local definition = definitions[input]
	if definition then -- check if a definition exists for the input
		print('Definition for '..input..':')
		print(definition)
	else
		print('Could not find definition for '..input)
	end

	print 'Press enter to continue.'
	read() -- just so the user can see what we have written before taking input again.
end

In this program, if you type "apples", it'll print "Red, sometimes sour, sometimes sweet, always juicy."

If you wanted that why did you ask

So does this also mean if a person said 16 it would perform the same function as if they said torch?

If kingdaro didn't answer what you need, then im confused

I don't think it is a dictionary, I think it is an item dispenser based on ID and name

I thought about something like that, instead of printing a definition, it would call a function.

Adapted my dictionary program:

function dispenseCookie()
	print "I'm dispensing a cookie!"
	-- code for dispensing a cookie
end

function dispenseTorch()
	print "I'm dispensing a torch!"
	-- code for dispensing torch
end

local operations = {
	Cookie = dispenseCookie,
	["357"] = dispenseCookie,

	Torch = dispenseTorch,
	["16"] = dispenseTorch
}

-- just for convenience.
local function clearScreen(  )
	term.clear()
	term.setCursorPos(1,1)
end

while true do
	clearScreen()

	print 'Dispense?'
	local input = read() -- this lets us know what the user typed

	clearScreen()

	local operation = operations[input]
	if operation then -- check if operation exists for the user input
		operation()
	else
		print 'Operation does not exist.'
	end

	print 'Press enter to continue.'
	read() -- just so the user can see what we wrote before taking input again.
end

that would work fine except that even if you say nothing in the read() prompt it returns an empty string. use

if operation and operation~='' then

here is an example of using the for loop and one function

local tOps={{'cookie',357,'357'},{'torch',16,'16'}}
local function dispense(item)
  print('Oh yeah! have a '..item..'!')
  --your code here (I would advise adding something to tOpts like a redstone code etc for each item to get it. up2u)
end

while true do
  term.clear()
  term.setCursorPos(1,1)
  print('What item would you like sir? [ name | id ]')
  write('input: ')
  local input=read()
  for num,tNames in pairs(tOpts) do
   for _num,name in pairs(tNames) do
	if input==name then
	 dispense(tNames[1]) --will call the dispense function with the FIRST name specified
	end
   end
  end
end