View difference between Paste ID: zJaJZM55 and ZBLUBnZ0

 --Movement Program by Galygious
 --Variables
     local tArgs = { ... }
 	local dirlist = {'u','l','r'}
 --Functions
     local printUsage = function(ecode)
         if ecode == 0 then
             print('Error Code 0\nThis program requires these variables:\narg1 - Direction (u,l,r)')
 			do return end
         elseif ecode == 1 then
 			print('Error Code 1\nThis program requires these variables:\narg1 - Direction (u,l,r)')
 			do return end
 		elseif ecode == 2 then
 			print('Error Code 2\nThis program requires that variable one be a direction (u,l,r)')
 			do return end
 		end
     end
 
 	local turtleturn = function(Dir)
 		if Dir == 'r' then
 				turtle.turnRight()
 		elseif Dir == 'l' then
 				turtle.turnLeft()
 		elseif Dir == 'u' then
 			for i=1,2 do
 				turtle.turnRight()
 			end
 		end
 	end
 
 	local hasval = function(tab,val)
 		for i, value in ipairs(tab) do
 			if value == val then
 				return true
 			end
 		end
 		return false
 	end
 
 --Argument Handling
 	if tArgs[1] ~= nil then
 		if #tArgs ~= 1 then
 			printUsage(1)
 		elseif not hasval(dirlist, tArgs[1]) then
 			printUsage(2)
 		else
 			local Dir = tArgs[1]
 			turtleturn(Dir)
 			return
 		end
 	else
 		printUsage(0)
 	end