bluebird-ff

Functional/Control-Flow utilities for Bluebird

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bluebird-ff
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Usage
The library can be used as a bluebird replacement:
var Promise = require('bluebird-ff');

You can use it as standalone functions:
var bff = require('bluebird-ff/ff');

Also, you can "install" it on a target:
var Promise = require("bluebird/js/main/promise")();

require('bluebird-ff/ff').install(Promise.prototype);

module.exports = Promise;
Functions

pif(test, consequent, alternate)

Calls consequent if test succeeds, otherwise, calls alternate.

when(test, consequent)

Calls consequent only if test succeeds.

unless(test, consequent)

Calls consequent only if test fails.

and(fn)

Useful for chaining several results, example:
return Promise.resolve(customerIds)
.then(loadCustomers)
.and(loadTransactionsFromCustomers)
.then(function(customers, transactions) {
	...
});

propsWithErrors(promises)

Like Promise.props, but returning AggregateError with each error.
License
Check here.