Changing the probability of something being chosen?

What I ended up with was a dictionary where you could specify how many times you want that weather type to be added to the weather list.

Useful Links:

http://wiki.roblox.com/index.php?title=Function_dump/Table_manipulation http://wiki.roblox.com/index.php?title=Table#Dictionaries

local weatherRaw = {
    ["Rain"] = 3;
    ["Snow"] = 2;
    ["Sunny"] = 4;
}

function selectWeather()
    local weatherList = {}
    for (key, value in pairs(weatherSettings)) do
        for (i = 1, value) do
            table.insert(weatherRaw, #weatherRaw + 1, key)
        end
    end
    return weatherRaw[math.random(1, #weatherList)]
end

local currentWeather = selectWeather()

The selectWeather function gets the weather name, and how many times you want it to be added to the list. It then adds each weather type the specified number of times and returns a random one.

In essence, it is almost exactly the same as:

local weather = {"Rain", "Rain", "Rain", "Snow", "Snow", "Sunny", "Sunny", Sunny", "Sunny"}
local selectedweather = weather[math.random(1, #weather)]

That is, except for the fact that it is more automated, and quite a bit less messy.

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