test, Lua - rextester

test

Schema = { rateItems = {} }

local function CalcRateArray(array)
    local array_rates = {}
	local total_rate = 0

for _, v in ipairs(array) do
		array_rates[#array_rates + 1] = v[2]
		total_rate = total_rate + v[2]
	end

array_rates[0] = total_rate
	for idx = 1, #array_rates do
		array_rates[idx] = array_rates[idx - 1] + array_rates[idx] / total_rate
	end

Schema.total_rate = total_rate
	return array_rates
end

function Schema.GetRandomRateItems()
	local randf = math.random()

for idx = 1, #Schema.rateItems do
		if (randf < Schema.rateItems[idx][2]) then
			return Schema.rateItems[idx][1]
		end
	end

return false
end

local items = { ['Sword'] = 50, ['Bandage'] = 80, ['Apple'] = 95 }

function InitializedPlugins()
	Schema.rateItems = {}

for itemID, v in pairs(items) do
			Schema.rateItems[#Schema.rateItems + 1] = {itemID, v}
	end

local array_rates = CalcRateArray(Schema.rateItems)
	for idx = 1, #array_rates do
		Schema.rateItems[idx] = {Schema.rateItems[idx][1], array_rates[idx]}
	end
	array_rates = nil
end

InitializedPlugins()

for k, v in ipairs(Schema.rateItems) do
    print(k, v[1], v[2])
end


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