queue.min.js

(function(){if(typeof module==="undefined")self.queue=queue;else module.exports=queue;queue.version="1.0.1";function queue(parallelism){var queue={},active=0,remaining=0,head,tail,error=null,results=[],await=noop,awaitAll;if(arguments.length<1)parallelism=Infinity;queue.defer=function(){if(!error){var node=arguments;node.index=results.push(undefined)-1;if(tail)tail.next=node,tail=tail.next;else head=tail=node;++remaining;pop()}return queue};queue.await=function(f){await=f;awaitAll=false;if(!remaining)notify();return queue};queue.awaitAll=function(f){await=f;awaitAll=true;if(!remaining)notify();return queue};function pop(){if(head&&active<parallelism){var node=head,f=node[0],a=Array.prototype.slice.call(node,1),i=node.index;if(head===tail)head=tail=null;else head=head.next;++active;a.push(function(e,r){--active;if(error!=null)return;if(e!=null){error=e;remaining=results=head=tail=null;notify()}else{results[i]=r;if(--remaining)pop();else notify()}});f.apply(null,a)}}function notify(){if(error!=null)await(error);else if(awaitAll)await(null,results);else await.apply(null,[null].concat(results))}return queue}function noop(){}})();