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- javascript only: You have been assigned to work with an undersea explorer who is attempting to identify and map undersea trenches. The explorer has provided you with several data sets. Depending on the scan, the provided matrix may be larger or smaller, but it will always be rectangular. Your task is to determine if a given data set contains a trench by comparing each node and their neighbors and determining if there is a pattern that matches the defined properties of a trench. Neighbors are considered to be nodes that are directly above, below, or to the side. No diagonals! A trench has the following three properties: It has a length of three or more nodes that are neighbors. Each node in the trench must be deeper than -5. Trenches may not branch into (any form of) a "T" shape. A node with more than two neighbors will result in branching "T" shape. // Example 1 sonar = [ [-5,-5,-5,-5,-5], [-5,-8,-8,-9,-7], [-5,-5,-5,-5,-8], [-5,-5,-5,-5,-5] ]What are the differences between List, Set, and Map interfaces?Study the scenario and complete the question(s) that follow: Sets and MapsA map is a container object that stores a collection of key/value pairs. It enables fast retrieval, deletion, and updating of the pair through the key. A map stores the values along with the keys. The keys are likeindexes. In List, the indexes are integers. In Map, the keys can be any objects. A map cannot contain duplicate keys. Each key maps to one value. A key and its corresponding value form an entry stored in a map. There are three types of maps: HashMap, LinkedHashMap, and TreeMap. The common features of these maps are defined in the Map interface. 1.1 Using the Map interface knowledge, create a Java application in NetBeans that implements a HashMap and a LinkedHashMap. The application must do the following: a. Add at least 5 elements to the HashMapb. Print out all the elements in the HashMap including their keysc. Find and print out the value of a specific indexd. Remove one of the elements from the…
- "Make a program using a map where the mapping value is a custom object of your design. It can be a one-to-one mapping or a one-to-many mapping, your choice." Maps Object Extension, Java, AP Computer Science A, simple. Hash Map. One Class.how to do filtering of fields which are aggregation and grouping! explain with an example..A map has the form Map <k,v> where: K: specifies the type of keys maintained in this map.V: defines the type of mapped values.Furthermore, the Map interface provides a set of methods that must be implemented. In this section, we will discuss about the most famous methods: clear: Removes all the elements from the map.containsKey: Returns true if the map contains the requested key.containsValue: Returns true if the map contains the requested value.equals: Compares an Object with the map for equality.get: Retrieve the value of the requested key.entrySet: Returns a Set view of the mappings contained in this map.keySet: Returns a Set that contains all keys of the map.put: Adds the requested key-value pair in the map.remove: Removes the requested key and its value from the map, if the key exists.size: Returns the number of key-value pairs currently in the map. Here is an example of TreeMap with a Map: import java.util.Map; import java.util.TreeMap; public class TreeMapExample {…
- Suppose that queue is a queueType object and the size of the array implementing queue is 65. Also, suppose that the value of queueFront is 64 and the value of queueRear is 64. a. How many elements are in queue?b. What are the values of queueFront and queueRear after adding an element to queue?c. What are the values of queueFront and queueRear after removing an element from queue?A map has the form Map <k,v> where: K: specifies the type of keys maintained in this map.V: defines the type of mapped values.Furthermore, the Map interface provides a set of methods that must be implemented. In this section, we will discuss about the most famous methods: clear: Removes all the elements from the map.containsKey: Returns true if the map contains the requested key.containsValue: Returns true if the map contains the requested value.equals: Compares an Object with the map for equality.get: Retrieve the value of the requested key.entrySet: Returns a Set view of the mappings contained in this map.keySet: Returns a Set that contains all keys of the map.put: Adds the requested key-value pair in the map.remove: Removes the requested key and its value from the map, if the key exists.size: Returns the number of key-value pairs currently in the map. Of interest to us is the TreeMap. Here is an example of TreeMap with a Map: import java.util.Map; import…Hi! Currently stuck in a java problem and would appreciate the help! Question: You have probably heard about the deque (double-ended queue) data structure, which allows for efficient pushing and popping of elements from both the front and back of the queue. Depending on the implementation, it also allows for efficient random access to any index element of the queue as well. Now, we want you to bring this data structure up to the next level, the teque (triple-ended queue)! The teque supports the following four operations: push_back x: insert the element ?x into the back of the teque. push_front x: insert the element ?x into the front of the teque. push_middle x: insert the element ?x into the middle of the teque. The inserted element ?x now becomes the new middle element of the teque. If ?k is the size of the teque before the insertion, the insertion index for ?x is (?+1)/2(k+1)/2 (using 00-based indexing). get i: prints out the ?thith index element (00-based) of the teque.…
- Given the nature of a set, one could implement the Set interface using any one of a variety of other collections or data structures. Describe how you might implement the Set interface using a LinkedList. Discuss the advantages and disadvantages of thisapproach.As we in general, try to solve the problem first; we start with a brute force, simple, algorithm: design it below # write your implementation here def maxProfitBrute(changes): it returns the indices of (i,j) indicating the day to buy and sell respectively to have the maximum profit in a list of prices per day in . Inputs: - changes: the list holding the changes in prices; the value whose index is k represents the change between day and day has at least a single change [two days] Output: - i: the index of the change before which we buy j: the index of the change after which we sell - maxProfit: the value of the maximum profit Example: changes = [1, 2] - that means the price started with ; day 1: it became - day 2: it became In that case: (i,j) = (0,1) as we should buy at the first day, and sell after the third day # return the values return (0,0,0) # Try vour alaorithmDescribe some data that might be best stored in a Java Collection LinkedList. Briefly explain why this is probably a good choice. Give an example of the LinkedList declaration and instantiation for your example. Show the code to store at least one value into your LinkedList.