Scope resolution... I give up...

[AnrDaemon]

Modding Cartograph_Notes to add some nice functionality to /note chat command. Just can't understand the general cause of variable scopes...
Subjected code is

			if text:match("^%d%d?%.%d%d? [^%d].*$") or text:match("^%d%d?%.%d%d?$") then
				text = text:gsub("^(%d%d?)%.(%d%d?)", "%1 %2", 1)
			end
			local x, y, title = (" "):split(text, 3)
			x, y = tonumber(x), tonumber(y)
			if not x or not y then
				self:Print(L["Usage: /note <0-100> <0-100> [title]"])
				return
			end
			x, y = x / 100, y / 100

around line 1338 in Cartographer_Notes/Notes.lua
What i'm doing, is basically that i'm retrieving actual player coords if no right coords were provided to command.
This way:

			if text:match("^%d%d?%.%d%d? [^%d].*$") or text:match("^%d%d?%.%d%d?$") then
				text = text:gsub("^(%d%d?)%.(%d%d?)", "%1 %2", 1)
				local x, y, title = (" "):split(text, 3)
			else
				local title = text;
				local x, y = GetPlayerMapPosition("player")
				x, y = x * 100, y * 100
				-- Some nice debudding printout
				self:Print("Coords: " .. x .. ";" .. y)
			end
			x, y = tonumber(x), tonumber(y)

			if (0 == x) or (0 == y) then
				self:Print(L["Usage: /note <0-100> <0-100> [title]"])
				return
			end
			x, y = x / 100, y / 100

Now tell me what i'm doing wrong why it every time telling me that i'm doing wrong things to global "y" in the last string?
The "x, y = x / 100, y / 100" one.

[Xus]

In your new code you're declaring locals x, y, title inside the if-else blocks, and THAT is their scope. You can fix it by declaring them above your if-else block and then only assigning a value to them inside.

[Mikord]

You've defined x, y, and title to be local to the if block and else block. They cease to exist once you exit the block.

local x, y, title
if text:match(....
 x, y, title = (" "):split(text, 3)
 x, y = tonumber(x), tonumber(y)
else
 title = text
 x, y = GetPlayerMapPosition("player")
end

-- Do whatever with x, y, and title.

[AnrDaemon]

Looks pretty silly comparing to the PHP...
And it were working ok' as it was, in first quoted block. Probably i didn't understand that code...

Thanks for your hints, now it works close to what I want.