[Function] Choose element by chance

[zbizu]

this function chooses one random element based on their chance to appear

input:

-- chances must be integers!
selectByChance({element1, element2, ...}, {chance1, chance2, ...})

output:

elementx

function:

function selectByChance(elements, chances)
    if #elements ~= #chances then
        return elements[math.random(1, #elements)]
    end
   
    local maxChance = 0
    for i = 1, #chances do
        maxChance = maxChance + chances[i]
    end
   
    local roll = math.random(1, maxChance)
    local chance = 0
    for i = 1, #elements do
        chance = chance + chances[i]
        if roll <= chance then
            return elements[i]
        end
    end
end