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Articles on Trending Technologies
Technical articles with clear explanations and examples
ArrayBlockingQueue put() method in Java
The put() method of the ArrayBlockingQueue class inserts the specified element at the tail of this queue. It waits for the space to become available, if the queue is full.The syntax is as follows:void put(E e)Here, e is the element to be inserted.To work with ArrayBlockingQueue class, you need to import the following package:import java.util.concurrent.ArrayBlockingQueue;The following is an example to implement put() method of Java ArrayBlockingQueue class:Exampleimport java.util.concurrent.ArrayBlockingQueue; public class Demo { public static void main(String[] args) throws InterruptedException { ArrayBlockingQueue q = new ArrayBlockingQueue(7); q.put(200); q.put(310); ...
Read MoreWhen should we write our own assignment operator in C++?
Here we will see when we need to create own assignment operator in C++. If a class do not have any pointers, then we do not need to create assignment operator and copy constructor. C++ compiler creates copy constructor and assignment operator for each class. If the operators are not sufficient, then we have to create our own assignment operator.Example#include using namespace std; class MyClass { //no user defined assignment operator or copy constructor is present int *ptr; public: MyClass (int x = 0) { ptr = new int(x); } void setValue (int x) { *ptr = x; } void print() { cout
Read MoreHow to create a Queue from LinkedList in Java?
Let us create a queue from LinkedList like this −Queuequeue = new LinkedList(); queue.add("P"); queue.add("Q"); queue.add("R"); queue.add("S"); queue.add("T"); queue.add("U"); queue.add("V");Now, use a List to display the elements of the queue −Listlist = new ArrayList(queue);Exampleimport java.util.ArrayList; import java.util.LinkedList; import java.util.List; import java.util.Queue; public class Demo { public static void main(String[] args) { Queuequeue = new LinkedList(); queue.add("P"); queue.add("Q"); queue.add("R"); queue.add("S"); queue.add("T"); queue.add("U"); queue.add("V"); Listlist = new ArrayList(queue); for (Object ob: ...
Read MoreNavigableSet Class lower() method in Java
The lower() method of NavigableSet returns the greatest element strictly less than the given element i.e. 35 here −lower(35);The following is an example to implement the lower() method in Java −Exampleimport java.util.NavigableSet; import java.util.TreeSet; public class Demo { public static void main(String[] args) { NavigableSet set = new TreeSet(); set.add(10); set.add(25); set.add(40); set.add(55); set.add(70); set.add(85); set.add(100); System.out.println("Returned Value = " + set.lower(35)); } }OutputReturned Value = 25
Read MoreShuffle vs random_shuffle in C++
Here we will see the Shuffle and random_shuffle in C++. Let us see the random_shuffle first. It is used to randomly rearrange the elements in range [left, right). This function randomly swaps the positions of each element with the position of some randomly chosen positions.We can provide some random generator function to tell which element will be taken in every case. If we do not provide some, it will use its own random generator function.Example#include using namespace std; int myRandomGenerator(int j) { return rand() % j; } main() { srand(unsigned(time(0))); vector arr; for (int j ...
Read MoreBind function and placeholders in C++
Here we will see the Bind function and the placeholders in C++. Sometimes we need to manipulate the operation of some functions as we need. We can use some default parameters to get some essence of manipulating.In C++11, one new feature is introduced, called the bind function. This helps us to do such manipulating in some easier fashion. To use these features, we have to use header file.Bind functions with the help of placeholders helps to determine the positions, and number of arguments to modify the function according to desired outputs.Placeholders are namespaces which detect the position of a ...
Read MoreHow to use subSet() method of Java NavigableSet Class
Use the subset() method to get elements from a limit. At first, create NavigableSet and add elements −NavigableSet set = new TreeSet(); set.add(10); set.add(25); set.add(40); set.add(55); set.add(70); set.add(85);Now, use the subset() method −set.subSet(40, 85)The following is an example to implement subset() method of Java NaviagbleSet class −Exampleimport java.util.NavigableSet; import java.util.TreeSet; public class Demo { public static void main(String[] args) { NavigableSet set = new TreeSet(); set.add(10); set.add(25); set.add(40); set.add(55); set.add(70); set.add(85); set.add(100); System.out.println("Returned Value = " + set.subSet(40, 85)); } }OutputReturned Value = [40, 55, 70]
Read MoreC++ Program to Perform Searching Based on Locality of Reference
Searching based on locality of reference, depends upon the memory access pattern data elements are reallocated.Here linear searching method is used to search an element.AlgorithmBegin int find(int *intarray, int n, int item) intialize comparisons = 0 for i = 0 to n-1 Increase comparisons if(item == intarray[i]) Print element with its index break if(i == n-1) Print element not found return -1 Print Total comparisons For j = i till i>0 intarray[j] = intarray[j-1] intarray[0] = ...
Read MoreExplain about field hiding in java?
Whenever you inherit a superclass a copy of superclass’s members is created at the subclass and you using its object you can access the superclass members.If the superclass and the subclass have instance variable of same name, if you access it using the subclass object, the subclass field hides the superclass’s field irrespective of the types. This mechanism is known as field hiding.But, since it makes code complicated field hiding is not recommended.ExampleIn the following example we have two classes Super and Sub one extending the other. They both have two fields with same names (name and age).When we print ...
Read MoreJava Program to create a new list with values from existing list with Function Mapper
To create a new list with values from fields from existing list with Function Mapper, the following is an example. Here, we have a class Employee −class Employee { private String emp_name; private int emp_age; private String emp_zone; }The following is an example that creates a new list from existing with Function Mapper −Exampleimport java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.function.Function; public class Demo { public static void main(String args[]) { List < Employee > emp = Arrays.asList(new Employee("Jack", 29, "South"), new Employee("Tom", 24, "North"), new Employee("Harry", 35, "West"), ...
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