named-queue like async.queue, but tasks are named and de-duplicated Init var namedQueue = require('named-queue') var queue = new namedQueue(processor, concurrency) processor - function(task, cb) concurrency - Number for maximum concurrent tasks; can be Infinity Methods WARNING All tasks must have an .id property used to identify and avoid doing the same task more than once at a time queue.push(task, cb) queue.unshift(task, cb) queue.length()