Calculate dynamic factor based on TTL
npm install dynamic-factorDynamic factor library provides a easy way to calculate factor that may change over time, for instance, factors based on page views, number of downloads, number of logged users and so on. Those factors are helpful into dynamic pricing, heatmap, realtime statistics, etc.
bash
npm i --save dynamic-factor
`How to use?
`javascript
const Dynamic = require('dynamic-factor');let perMinute = new Dynamic(60, 10); // ttl set to 1min, denominator = 10
console.info(perMinute.get("page_views")) // undefined
console.info(perMinute.factor("page_views")) // 0
perMinute.set("page_views", 100)
console.info(perMinute.get("page_views")) // 100
console.info(perMinute.factor("page_views")) // 10
perMinute.inc("page_views")
console.info(perMinute.get("page_views")) // 101
console.info(perMinute.factor("page_views")) // 10.1
perMinute.inc("page_views", 2)
console.info(perMinute.get("page_views")) // 103
console.info(perMinute.factor("page_views")) // 10.3
// 1 minute without changes
console.info(perMinute.get("page_views")) // undefined
console.info(perMinute.factor("page_views")) // 0
`The example above shows how to use
Dynamic class to calculate page_views factor. Note that the page_views` key will be expired in 1 minute after the last change.