Module:Ordinals

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{{#invoke:Ordinals|convertNumberToOrdinal |num=2 }}

2de

3de

8ste

10de

11de

8345ste

---

local p = {}

p.convertNumberToOrdinal = function( frame )
	local num = frame.args.num or nil
	if num == nil then return "" end

	num = mw.text.trim( num )
	if num == "1" then return "1ste" end
	if num == "8" then return "8ste" end

	-- do 2-9 first
	local lastDigit = string.sub( num, -1)
	local numeralsWithDeSuffix1 = { "2", "3", "4", "5", "6", "7", "9" }
	for _,v in ipairs( numeralsWithDeSuffix1 ) do
		if num == v then
			return num .. "de"
		end
	end

	local lastTwoDigits = string.sub( num, -2)
	local numeralsWithDeSuffix2 = { "10", "11", "12", "13", "14", "15", "16", "17", "18", "19" }
	
	for _,v in ipairs( numeralsWithDeSuffix2 ) do
		if lastTwoDigits == v then
			return num .. "de"
		end
	end
	
	-- else
	return num .. "ste"

	-- 1ste, 11de, 21ste, 31ste, 101ste
	-- 8ste, 18de, 28ste

	-- similar 
	-- 2de, 12de, 22ste, 32ste, etc.
	-- 3rde, 13rde, 23ste, 33ste, ...
	-- 4de, 14de, 24ste, ...
	-- 5de, 15de, 25ste, ...
	-- 6de, 16de, 26ste, ...
	-- 7de, 17de, 27ste, ...
	-- 9de, 19de, 29ste
	-- 10de, 20ste, 21ste
end

return p