The numbersĮach item in the refrigerator are assigned are the priority values, so in Sooner and should be eaten sooner, and thus have higher priority. Than items with larger numbers), items with smaller numbers would expire In the fridge a number based on how much time this item has left before itsĮxpiration date (items with smaller numbers mean that they will expire sooner The numbers the patients are assigned are the priority values, so in thisĬase larger priority values mean higher priority.Īlternatively, if we were looking in our refrigerator and assigned each item Severe injuries and should be helped sooner, and thus have higher priority. Numbers mean more severe), patients with higher numbers would have more On how severe their injury was (smaller numbers mean less severe and larger If we were in an emergency room and each patient was assigned a number based The element with the highest priority may not always have the highest Queue, while priority value is the value associated with each item inserted. Priority is how important an item is to the priority Throughout this lab, we will be making a distinction between the priority and We may instead want to process items in order of importance Not necessarily be the ones who need to be seen first.Īs we see with the emergency room, sometimes processing items LIFO or FIFO is Most urgent conditions are helped first? We can’t only rely on when the patientsĪrrive in the emergency room, since those who arrived first or most recently will When we process items in a queue, we process the oldest elements first and the most recentlyīut what if we want to model an emergency room, where people waiting with the The queue is a first-in-first-out (FIFO) abstract data type. Much like a physical stack, we can only access to the most recently added elements firstĪnd the oldest elements last. The stack is a last-in-first-out (LIFO) abstract data type. We’ve learned about a few abstract data types already, To implement the priority queue, we will implement it using the heap, which is a tree-like structure that enforces an ordering based on priority going down the layers. In this lab, we will be implementing the Priority Queue, a data structure that automatically orders the data in it according to a certain priority value. The FAQ for Lab 14 is locatedĪs usual, pull the files from the skeleton and open them in IntelliJ. You can also access it byĪdding “/faq” to the end of the URL. Each assignment will have an FAQ linked at the top.
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