Difference between revisions of "Module:TableTools"

Module:TableTools (view source)

790 bytes added , 10 years ago

add getAffixNums function

Anonymous user

@@ Line 39: / Line 39: @@
 		if isPositiveInteger(k) then
 			nums[#nums + 1] = k
+		end
+	end
+	table.sort(nums)
+	return nums
+end
+--[[
+-----------------------------------------------------------------------------------
+-- getAffixNums
+--
+-- This takes a table and returns an array containing the numbers of keys with the
+-- specified prefix and suffix. For example, for the table
+-- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", getAffixNums will
+-- return {1, 3, 6}.
+-----------------------------------------------------------------------------------
+--]]
+function p.getAffixNums(t, prefix, suffix)
+	prefix = prefix or ''
+	suffix = suffix or ''
+	local nums = {}
+	for k, v in pairs(t) do
+		if type(k) == 'string' then
+			local num = mw.ustring.match(k, '^' .. prefix .. '([1-9]%d*)' .. suffix .. '$')
+			if num then
+				nums[#nums + 1] = tonumber(num)
+			end
 		end
 	end