String to Roman Numberal

[suicidalkatt]

I'm trying to find a good way to change a string "Rank #" to a roman numberal.

The number should not be more than 10 so I'm fine with converting a number a roman numberal.

However I'm not incredibly sure of what I'm doing with pattern matching.

local function stringToRoman(string)
	local number = string.find(string, "%d")
	if number == 1 then
		return ""
	elseif number == 2 then
		return " II"
	elseif number == 3 then
		return " III"
	elseif number == 4 then
		return " IV" 
	elseif number == 5 then
		return " V"
	elseif number == 6 then
		return " VI"
	elseif number == 7 then
		return " VII" 
	elseif number == 8 then
		return " VIII"
	elseif number == 9 then
		return " IX"
	elseif number == 10 then
		return " X"
	else
		return ""
	end
end

function TotemLocales(number)
	local name, rank = GetSpellInfo(number)
	rank = stringToRoman(rank)
	print(name..rank)
end

Edit: From what I can tell it's basically returning 6 every time and is probably a result of what character is the first number of the string?

The number is always the 6th character of the string.
Rank_4

[xConStruct]

string.find returns the position where the match occured, like you suspected.

You're looking for:
local number = string:match("(%d+)")

[suicidalkatt]

Originally Posted by Cargor string.find returns the position where the match occured, like you suspected. You're looking for: local number = string:match("(%d+)")

Thanks :P

local function stringToRoman(string)
	local number = string.match(string, ("%d+"))
	if number == "1" then
		return ""
	elseif number == "2" then
		return " II"
	elseif number == "3" then
		return " III"
	elseif number == "4" then
		return " IV" 
	elseif number == "5" then
		return " V"
	elseif number == "6" then
		return " VI"
	elseif number == "7" then
		return " VII" 
	elseif number == "8" then
		return " VIII"
	elseif number == "9" then
		return " IX"
	elseif number == "10" then
		return " X"
	else
		return " invalid return"
	end
end

function TotemLocales(number)
	local name, rank = GetSpellInfo(number)
	rank = stringToRoman(rank)
	print(name..rank)
end

Now returns a spell name and rank for totems wooT!

[Waverian]

local roman = {
	-- using an array with implicit keys
	"",
	"II",
	"III",
	"IV",
	"V",
	"VI",
	"VII",
	"VIII",
	"IX",
	"X",
}

function TotemLocales(spellID)
	local name, rank = GetSpellInfo(spellID)
	print(("%s %s"):format(name, roman[rank]))
end