计算用户按下按钮的频率的函数 [英] Function to calculate how often users are pressing a button

问题描述

我有一个功能.下面是一个原型

I have got a function. Below is a prototype

void onNewButtonPress(int64_t nanoseconds_timestamp, int32_t user_id);

有点杂乱无章.每当具有user_id的用户按下按钮时，都会调用此函数.其中nanoseconds_timestamp参数是自纪元以来的时间(以纳秒为单位)

A bit of destription. This function will be called each time a user with a user_id is pressing the button. Where nanoseconds_timestamp parameter is the time in nanoseconds since the epoch

此功能将需要获取用户按下按钮的速率，基本上是用户每秒按下一次按钮的次数.

This function will need to get the rate of user button presses, basically how many times per second a user pressed a button.

如何计算每个用户的费率，存储并定期更新?是否可以使用上面的函数来完成此操作，否则我将不得不创建另一个函数，该函数将定期调用并计算费率.

How can I calculate the rate for each user, store it and update it periodically? Is it possible to do it using just above function or I will have to create another function which will be called periodically and will calculate the rates.

如何处理在周期结束时开始按下按钮的用户.我需要平均吗?

How do I deal with users which started pressing button close to the end of the period. Do I need to average it?

根据您的经验，我很想听听您的意见.

I will be very interested to hear your opinions based on your experience.

推荐答案

类似这样的东西

具有用于存储用户时间戳记的全局/成员变量

Have a global/member variable that stores the users timestamps

std::map<int32_t, int64_t> lastClick;

然后计算差异并将其求反以得出汇率:

Then calculate the difference and invert it to get the rate:

   void onNewButtonPress(int64_t nanoseconds_timestamp, int32_t user_id) {
      if (auto last = lastClick[user_id]) {
         auto rate = 1000000000 / (nanoseconds_timestamp - last);
         // Use the rate for something
         lastClick[user_id] = nanoseconds_timestamp;
      }
   }

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