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An array can be reversed in groups of a given size by reversing the subarrays of the required size. In the given article, the program demonstrates a technique for reversing an array in groups of a specified size. This technique is useful in various computational tasks and algorithm design. The program takes an array and a group size as input and reverses the array in groups of that size. The original and modified arrays are then printed to the console. Problem Statement Write a Java program to reverse an array in groups of a given size. An example of ... Read More
This article will explain how to iterate over ArrayList using lambda expression. The ArrayList class is a resizable array that can be found in java.util package. The difference between a built-in array and an ArrayList in Java is that the size of an array cannot be modified. Problem Statement Write a Java program to iterate over an ArrayList using lambda expressions. Below is a demonstration of the same − Input Run the program Output The list is defined as: Java Python Scala Mysql Redshift Approaches to find length of the longest substring without repeating characters ... Read More
In this article, we will understand how to sum the elements present inside a vector in C++. A vector is a dynamically allocated array with variable size. The sum of elements of a vector can be calculated in a number of ways, and we will discuss two such ways. Problem Statement Given a non-empty vector of integers, calculate the sum of all elements of the vector using multiple approaches in C++. Examples The following examples give the input and output of some test cases : Input vector vec={1, 3, 4, 5, 2, 3} Output ... Read More
Gradle is a tool which is used in Java development. One of its main jobs is to create automation tools. Maven is used as an alternative to Gradle but it is older and helps in building the tools which are best for a project. Developers can make a choice between them on the basis of their requirements for a project. In this article, we will discuss the difference between Gradle and Maven. What is Gradle? Gradle is an open-source automation system which uses domain-specific language called Groovy. This is a programming language that uses XML for the configuration of a ... Read More
In HTML tables, the element is used to group and organize the content of the table into sections. It is especially useful when working with large tables. It helps to manage and style the data effectively. While a table contains one , you can have multiple elements within the same table to structure data into different sections or categories. Why to use Multiple Elements? Grouping Data: Multiple elements allow you to group related rows of data separately within the same table. Styling: You can apply ... Read More
In Java, substrings are part of the string which contains the continuous character of the string of any length from 1 to complete string. We are given a string and we have to find the length of the largest substring from the given string that only contains the unique characters. We will see three types of methods: finding every substring, sliding windows, and two-pointers. Problem Statement Given a string, write a Java program to find length of the longest substring without repeating characters − Input thisisthegivenstring Output The length of the longest substring that contains only unique characters is: ... Read More
SQL is a language which consists of different types of clauses in the Select statement like Where Group by Having Order by These clauses are used to retrieve values, sort them, group them, and do a lot of other things. In this article, we will discuss the difference between having clause and group by clause. What is Having Clause? The Having clause is used to filter groups of rows based on a condition, which often includes the aggregate functions. It comes after the GROUP BY clause in a SQL query. Unlike the WHERE clause, which filters rows before ... Read More
Logical reasoning is one of the main subjects of computer science and mathematics. This reasoning helps in making the decisions of whether different types of mathematical arguments are correct or not. It can be divided into propositional logic and predicate logic. Both of these topics are required for different subjects like mathematics, philosophy, computer science, etc. These concepts are very complex and are used in creating various types of arguments. Let us discuss the difference between propositional logic and predicate logic. What is Propositional Logic? A proposition consists of a truth value which should not be ambiguous to the two ... Read More
When we start learning Java, we often wonder about symbols like @override and @inherited written within the code blocks. They are a special kind of tag termed as Annotations that can be applied to classes, methods, fields, parameters, and other elements of the code. The @Target annotation is one of the types of meta-annotations that specifies the defined annotation type applicable to which code block element. Don't get confused by these terms, we will clear all the doubts and confusion as we move forward in this article. The @Target Annotation of Java The first thing we need to understand is ... Read More
Method overriding is an example of runtime polymorphism. In method overriding, a subclass overrides a method with the same signature as that of in its superclass. During compile time, the check is made on the reference type. However, in the runtime, JVM figures out the object type and would run the method that belongs to that particular object. Problem Statement Demonstrate runtime polymorphism in Java using multilevel inheritance and method overriding. Output Animals can move Puppy can move. Naïve Approach Below are the steps to implement runtime polymorphism in Java using multilevel inheritance − Step ... Read More