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pq.js
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pq.js
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/**
* - Implementing Priority Queues
* - Different from normal Queues due to enqueuing mechanism
*/
var PQ = function(){
var collection =[];
this.enqueue = function(element){
//param:Array ["Item", priority]
if(this.isEmpty()){
collection.push(element);
return;
}
else{
var added = false;
for(let i=0; i<collection.length; i++){
if(element[1]< collection[i][1]){
collection.splice(i, 0, element);
added = true;
break;
}
}
if(!added){
collection.push(element);
}
}
}
this.isEmpty = function(){
return (collection.length === 0);
}
this.front = function(){
return collection[0];
}
this.size = function(){
return collection.length;
}
this.print = function(){
console.log(collection);
}
this.dequeue = function(){
var value = collection.shift();
return value[0];
}
}
var newPQ = new PQ();
newPQ.enqueue(['Malik', 1]);
newPQ.enqueue(['Lateef3', 3]);
newPQ.enqueue(['Lateef', 2]);
newPQ.enqueue(['Lateef', 2]);
newPQ.enqueue(['Lateef', 4]);
newPQ.dequeue();
newPQ.print()