原理：随机数随机1,10000个数，其中随机到到数和10000*0.1（概率）=1000进行比较，随机数大于1000则不选中，反之则选中。
local successCount =0;
local commitPercent = 0.1;
local percent = commitPercent*10000;
for i=1,100 do
local randomNum = math.random(1,10000);
sysLog(“–randomNum–“..randomNum..”–commitPercent–“..percent)
if randomNum>percent then
sysLog(“–false–“)
else
sysLog(“–true–“)
successCount = successCount +1;
end
end
sysLog(“–successCount–“..successCount)
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