I'm not that familiar with lua, so I would like someone to doublecheck my
assumptions.
I see that the code calls
local rv = plr:get_buildings{"well", "burners_house"}
The way I've interpreted this is that it gives me a map which contains building
names as the keys and the amount of those buildings as the values. So if the
player has two wells, calling #rv.well would look up the value associated with
that key and return 2.
So the keys of the map seem to be available as attributes of rv, but it is not
clear to me how for instance #rv.well came into existance. Is this populated
by the parameters passed to get_buildings (or perhaps all building types
available to a player)? Basically I want to know whether #rv.charcoal_kiln will
exist or if I need to do something more in order to create this attribute?
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