Lua ZOMFG!!1 (not related to hax)

[Guest]

trying to convert from SourcePawn to Lua, and I just can't get it right. if you know Lua and is willing to help, I'd appreciate it.

public get_playercount(bool:zombie = true)
{
	new num
	
	for(new x = 1; x <= MaxClients; x++)
		if(zombie && global[x] || !zombie && !global[x])
			num++
			
	return num
}

function get_playercount(zombie = true) -- I am right?
	local num
	
	for k, v in pairs(player.GetAll()) do
		if zombie == nil and .. or zombie != nil and ... then -- yes, I have no clue of how to handle global variables on Lua so .. means global[v] and ... means !global[v]
			num = num + 1 -- ok, Lua math is also weird as fuck. why can't I simply do num++ or even num += 1?
		end
	end

	return num
end