Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
A Prism refers to a three-dimensional solid object which has two identical ends. A prism has two faces, which are: Top and Bottom face. Lateral face Both top and bottom faces are called bases which are identical to each other. All lateral faces are also identical to each other which belong to the class of parallelograms. When the base of the prism is triangular in shape that prism is called a Triangular prism. Similarly, when the base of a prism is rectangular in shape it is called a Rectangular prism. ... Read More
Yes! we can override the start() method of the Thread class in Java. But, if we do so, we must call it using super.start(), which will create a new thread; otherwise, no new thread will be created, and the run() method will not execute in parallel for the other threads. Overriding the start() Method In Java, the start() method is used to begin (start) the execution of a new Thread. When this method is called, it invokes the run() method, which executes in parallel with other threads. Example In the following example, we override the start() method within the subclass of ... Read More
Regular expression, or regex, is a useful tool in Python that helps identifying and processing of text patterns. It helps you cut, edit and check text in different ways. In this article, we will talk about how not to match a character after repetition in regex and look at five different examples. We will provide you a clear explanation to help you understand how each one works. All of the examples we will create in this article, we will use the re.findall() method, which is a built-in method of Python's re module. Let us know about this function first - ... Read More
This article explains how to work with Regular Expressions (RegEx) in Python using the "re" module. RegEx is a sequence of characters that defines a search pattern. Below are different ways to use RegEx in Python. These are some of the essential methods in Python's re module that help with pattern matching, searching, replacing, and extracting data efficiently. Using the re.match() method Using the re.findall() method Using the re.search() method Using the re.sub() and re.subn() methods Using the re.split() method Using re.match() Method The re.match() method checks if a string matches a given pattern at the ... Read More
The graph can be represented using various ways. One of the technique is to use a 2D array, also known as adjacency matrix. The adjacency matrix is a square matrix of size V x V to represent a finite graph data structure using a 2D array, where V is the number of nodes/vertex of the graph. In an undirected non-weighted graph, if there is an edge between vertex i and vertex j, the value at matrix[i][j] is 1 and if no edge exists, the value is 0. In this article, our task is to represent the graph using 2D arrays. ... Read More
A Directed Acyclic Graph or DAG is a directed graph (a graph where each edge has a direction) that has no cycles present i.e. if we traverse along the direction of the edges then no closed loops are formed along any path. A DAG is always topologically ordered, i.e. for each edge in the graph, the start vertex of the edge(u) occurs earlier in the sequence than the ending vertex(v) of the edge i.e.(u {B C} B -> {Isolated Vertex} C -> {Isolated Vertex} D -> {B E} E -> {C} Steps to Generate Random Directed Acyclic Graph The ... Read More
This article will discuss how to compare regular expressions in Perl and Python. Regular expressions, or regex, are patterns used to match strings. Both Perl and Python support regex, but they have some differences in syntax and usage. For example, you write a regular expression like this in Perl - $text =~ /pattern/ But you write it like this in Python - re.search('pattern', text) So in the below section of this article will show the similarities and differences between Perl and Python regex with simple examples - ... Read More
In C++ program, struct is a keyword used to define a structure, while typedef is a keyword that is used to create an alias for a data type. In this article, we will discuss the difference between struct and typedef struct in C++. Struct in C++ Struct is a keyword used to define a structure in C++. A structure is a user-defined data type that groups related variables of different data types into a single unit. Struct is same as a class, but the members of a struct are public by default. The syntax for defining a struct is ... Read More
In C++, char[] represents a character array, while string is a class in STL to manage text data. Both string and char[] can be used to store and process text data. But, they are different in terms of structure, usage, memory management, and capabilities. In this article, we will discuss the difference between string and char[] types in C++. char[] in C++ char[] is an array of characters that is used to store a string. It is a C-style string representation. The size of char array will be fixed. At the end of the array, a null character '\0' ... Read More
In C++ we can compare two strings using compare() function and the == operator. Then the question is why there are two different methods? Is there any difference or not? Yes, there are some basic differences between compare() and == operator. In C++ the == operator is overloaded for the string to check whether both strings are same or not. If they are the same this will return 1, otherwise 0. So it is like Boolean type function. The compare() function returns two different things. If both are equal, it will return 0, If the mismatch is ... Read More