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In this problem, we are given an array, and we have to replace each element with its rank. The rank of an element is the position of the element when element of the array is arranged in sorted order. In this article, we are going to learn about various approaches to replacing elements with their rank in an array using JavaScript. Below are the examples to understand the problem clearly - Example 1: Input: arr = [40, 10, 20, 30] Output: [4, 1, 2, 3] Explanation: The sorted, unique array is: [10, 20, ... Read More
A single character can be matched in Python using a regular expression. A regular expression is a sequence of characters that helps you find a string or a set of strings using a search pattern. Regular expressions are also known as RegEx. Python provides the re module that is used to work with regular expressions - Using findall() function We use findall() searches for the strings matching the specified pattern in the given string and return all the matches in the form of a list of strings or tuples. Example 1 In the following example, we begin by importing the regular ... Read More
A circular linked list is a type of linked list where the last node and first node are the same, forming a loop. There are many real-life applications of splitting a circular linked list into two halves for easier processing, load balancing, or efficient data manipulation. In this article, we are going to learn different approaches to split a circular linked list into two halves in C++. What is the Splitting of a Circular Linked List? Splitting of a Circular linked list is dividing the given linked list into two separate linked lists: If ... Read More
Finding the Kth largest element in a 2D matrix where each row and column is sorted is a common problem in computer science. This problem has many real-life applications, such as a ranking system, where we need to find the Kth highest score in a sorted dataset. In this article, we are going to discuss how we can find the Kth largest element in a 2D matrix e where each row and column is in sorted order in the C++ language. What is the Kth Largest Element? The Kth largest element refers to an element that is placed at ... Read More
In this article, we will learn the different approaches to replace a part of a string with another string using a C/C++ program. The problem statement of this program is explained below: The input of this problem will be three strings. The task is to replace all the occurrence of the second string with the third string inside the first string. For example: // Input strings "C++ Course is free on Tutorialspoint" "C++" "Python" // Output String "Python Course is free on Tutorialspoint" Replace a Substring With Another String Here is the list of all ... Read More
A Python dictionary is an unordered, mutable collection of key-value pairs. Keys must be unique and immutable, while the other values can be of any other type. Dictionaries are useful for fast data storage and organization using meaningful keys. Optimizing Python Dictionary To optimize Python dictionaries, use suitable key types like strings or integers and pre-size them using methods such as dict.fromkeys() or collections.defaultdict() function. This enhances access speed, reduces memory usage, and specific overall performance. Optimizing dictionary access in Python can significantly improve performance in large programs. Here are several ways to do that with explanations and examples - ... Read More
In Python, regular expressions (regex) search and manipulate strings in various ways. If we need to match whitespace characters without including newline characters. This article will explore how to achieve this using Python’s re module. The following are the methods included to match whitespace but not newlines using Python regular expressions - Using re.sub() Method Using re.findall() Method Using Positive Lookahead Using re.sub() Method The re.sub() method offers an efficient way to replace whitespace characters (excluding newlines) within a string. This method takes the pattern ... Read More
What is Variable Scope in Python? Variable scope in Python defines where a variable can be assigned or modified in your code. It determines the visibility and lifetime of variables, controlling which parts of your program can use particular variables. Variable scope in Python provides many benefits, which include - To avoid naming conflicts To manage memory efficiently To write more maintainable and modular code To prevent unnecessary variable modifications Python has four main levels of variable scope, which is the LEGB ... Read More
In C++, a semicolon(;) indicates the end of a statement in code, or we can say it terminates the statement. When you use a semicolon just after an if or while statement, it creates an empty statement, which executes nothing. Semicolon with If Statement In C++, the if statement is a conditional statement that runs only if the condition is true, where {} braces are used to write the condition inside them. But if you use a semicolon just after the if statement, it will still check the condition, but it controls just an empty operation; therefore, nothing will happen ... Read More
Trailing zeros are the zero occuring at the end of a string. In this article, we will discuss different approaches to remove trailing zeros from a string. The below section explains the problem statement. The input of this problem is a non-empty string containing characters and numbers. Our task is to remove all the zero's appering after the last non-zero character in the string. For example: // Input string "012424000" // Output String "012424" Remove Trailing Zeros From String Here is the list of approaches to remove all the trailing zeros from a string ... Read More