$3

Exponential backoff with time outs in 2^n ms durations.

Usage:

+ After importing the package, you can use these different types of functions:

Capped

``
function capped(maxTries, producer, callback);
Here the default error checker is by checking if the statusCode is in the OK range ie >= 200 && <= 299
`

`
function cappedCustom(maxTries, errChecker, producer, callback);
Just like the capped version but you can provide a custom errChecker
`

`
function cappedNet(maxTries, producer, callback);
Here the default error checker is by checking if the statusCode is in the OK range ie >= 200 && <= 299
`

`
function cappedDefault(maxTries, producer, callback);
Here the default error checker is by checking if the err is null
`

Uncapped

`
function uncapped(producer, callback);
Here the default max value for tries is Math.log2(MAX_INT) and the default error checker is a netChecker
`

`
function uncappedCustom(errChecker, producer, callback);
Just like the uncapped version but here you can provide a custom errChecker
`

`
function uncappedNet(producer, callback);
Here the default error checker is by checking if the statusCode is in the OK range ie >= 200 && <= 299
`

`
function uncappedDefault(maxTries, producer, callback);
Here the default error checker is by checking if the err is null
`

Sample usage:

`javascript
const expb = require('expb.js');
const request = require('request');

function statusCode(err, result) {
if (err)
return 500;
if (!result)
return 404;
return 200;
};

function queryGithub(callback) {
request.get('https://github.com/search?q=exponential', function(err, response, result) {
var status = statusCode(err, result);
callback(status, { response: response, result: result });
});
};

function tryGithub() {
var func = expb.capped(10, queryGithub, function(status, result) {
console.log(status, result);
process.exit(0);
});

func();
};

tryGithub();
``