Priority QueueA priority queue is a data structure with these operations:OperationSyntax (js-priority-queue)Description Create var queue = new PriorityQueue(); Creates a priority queue Queue queue.queue(value);
enqueue(ele, priority) { letqueueEle = { ele, priority }; if(this.isEmpty) { this.items.push(queueEle); }else{ letpreIndex =this.items.findIndex(item => queueEle.priority < item.priority); if(preIndex > -1) { this.items.splice(preIndex, 0, queueEle); }else{ this.items.push(...
queue.length;6};7this.value =function(){8returnqueue;9};10this.enqueue =function(item) {11if(this.isEmpty()) {12queue.push(item);13}else{14varflag =false;//判断是否排队15for(let i = 0; i < queue.length; i++) {16if(queue[i].priority <=item.priority) {17queue.splice...
functionPriorityQueue(){// 先创建一个 Item 构造函数,用于创建加入优先级队列的元素functionItem(item,p){this.element=itemthis.priority=p}// 继承队列 Queue 的属性Queue.call(this)// 重写属于优先级队列 push 方法PriorityQueue.prototype.push=function(newItem,p){constitem=newItem(newItem,p)// 如果队列...
queue with priority q.push({name: 'foo3'}, 3, function(err) { console.log('Finished processing foo'); }); q.push({name: 'bar2'}, 2, function (err) { console.log('Finished processing bar'); }); // add some items to the queue (batch-wise) which will have same priority q....
源码放在lib/internal/priority_queue.js中,一些博文也直接翻译为优先队列,它们是抽象结构和具体实现之间的关系,特性是一致的。二叉堆是一棵有序的完全二叉树,又以节点与其后裔节点的关系分为最大堆和最小堆。完全二叉树的特点使其可以很容易地转化为一维数组来存储,且不需要二外记录其父子关系,索引为i的节点的左右...
Priority Queue usage JavaScript / Python-style iterator (recommended) Iterates over the heap consuming it, and guarantees to traverse the elements of the heap in the order of priority. Useful. const{Heap}=require('heap-js');// Get all tasks from the databaseconsttasks=db.collection.find()...
For convenience, priority-async-queue referred to as paq.1. addTaskCreate a task and join in the paq queue.paq.addTask([options, ]callback);options is an optional object that contains the following attributes:{ id: undefined, // task id priority: 'normal', // task priority, such as:...
function PriorityQueue() { //声明一个items用于保存元素 var items = []; //创建一个QueueElement类,用于保存元素和其在队列中的优先级(priority越小,优先级越高) function QueueElement(element,priority) { this.element = element; this.priority = priority; } this.enqueue = function(element,priority) ...
Pass an options object after the job argument in the Queue.add() method. Job options properties are: priority: number - Optional priority value. Ranges from 1 (highest priority) to MAX_INT (lowest priority). Note that using priorities has a slight impact on performance, so use them with ...