js模拟队列----小优先队列

var Queue = (function(){var item = new WeakMap();class Queue{constructor(){item.set(this,[]);}enqueue(ele,priority){var ls = item.get(this);var obj = {ele:ele,pro:priority};var add = false;for(var i = 0; i < ls.length; i++ ){if(priority < ls[i].pro){ls.splice(i,0,obj);add = true;break;}}if(!add){ls.push(obj);}}dequeue(){var ls = item.get(this);return ls.shift();}size(){var ls = item.get(this);return ls.length;}front(){var ls = item.get(this);return ls[0];}isEmpty(){var ls = item.get(this);return !ls.length;}print(){var ls = item.get(this);for(var i = 0; i < ls.length; i++){console.log(`${ls[i].ele}-${ls[i].pro}`);}}}return Queue;})();var queue = new Queue();queue.enqueue("b",2);queue.enqueue("a",1);queue.enqueue("c",3);queue.enqueue("d",4);queue.print();