dinigo/README.md

Cached Runner receives a period of time and a request function, and performs all async operations to get the data. If you retry the request in a time shorter than the period it returns the cached result instead.

You can also set a postprocess function and another function that runs every time.

Here you have an example:

const period = 2000;  // ms
const allways = data => +new Date() + ' --> ' + data;  // an allways run function that adds a timestamp
const request = () => Math.random();  // a request function that generates a random number
const process = num => `~(${Math.ceil(num*100)})~`;
const cachedRun = new CachedRun(period, request, process, allways);
cachedRun.start().then(res => console.log(res));
setTimeout(() => cachedRun.start().then(res => console.log(res)),1000);
setTimeout(() => cachedRun.start().then(res => console.log(res)),3000);

Inmediate after invocation request -> process -> cached -> allways -> returned. New timestamp and new random number:

> "1513186989013 --> ~(4)~"

One second after invocation data isn't refreshed since period hasn't expired so: cached -> allways -> returned. New timestamp and cached random number:

> "1513186990016 --> ~(4)~"

Three secons after first invocation cache has expired, so request is rerun: request -> process -> cached -> allways -> returned. New timestamp and new random number:

> "1513186992017 --> ~(90)~"