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Finding a unique number in a list that appears only once while all other numbers appear twice is a common and important problem in programming. We can find the unique number in a list using multiple ways. The most efficient approach is using an XOR operator, as this method solves this problem in constant time and space complexity. In this article, we are going to discuss various approaches to finding the number that appears once while all others appear twice. Finding the Unique Number When we are given a list of numbers where every number appears twice except one ... Read More
When working with files in Python, it's crucial to understand the different modes in which files can be opened. Each mode defines specific operations you can perform whether reading, writing, appending, or handling binary data. Following are the common file modes in Python. Read Mode: 'r' Write Mode: 'w' Binary Mode: 'b' Append Mode: 'a' Read Mode: 'r' The default mode for opening files in Python is read mode ('r'). This allows you to read the contents of a file without modifying ... Read More
The first and last position of any element in a sorted array is a common operation in the world of programming. In C++, there are multiple ways to find the first and last position of an element in a sorted array. In this article, we are going to discuss various approaches for finding the first and last occurrence of an element in a sorted array using C++. How to Find the First and Last Position of an Element? In this problem, we are given a sorted array and a target element. We need to find the first and last ... Read More
In this problem, we are given a number n, and we need to find the position of the first set bit (1-bit) in its binary representation. In this article, we are going to discuss different approaches to solving this problem using C#. Example 1 Input: N = 18 Output: 2 Explanation: The binary representation of 18 is 10010. The first set bit from the right is at position 2. Example 2 Input: N = 12 Output: 3 Explanation: The binary ... Read More
Sorting an array containing values from 1 to n means arranging the integers in their natural ascending order. This type of sorting problem is commonly encountered in competitive programming (for solving complex problems), where the array is guaranteed to have integers ranging from 1 to n. In this article, we will explore various approaches to solving this problem. In this problem, we are given an array containing values ranging from 1 to n in random order. Our goal is to sort the array in ascending order. Example 1 Input: int array[] = {3, 1, 2, ... Read More
In this article, we will learn about the collections in Java. The collections are used to store and manipulate groups of objects. Java collections can be broadly classified into two types − Non-generic Collections (Before Java 5) Generic Collections (Introduced in Java 5) Non-generic collections allow storing objects of different types leading to runtime errors. On the other hand generic collections enforce type safety at compile-time, reducing the risk of type-related errors. Non - Generic Collection When the data structure is non-generic, it causes issues when the data is tried ... Read More
In this article, we will learn about Parallel Data Processing in Java. Parallel processing of data is important to increase performance, particularly for large amounts of data. Java has its own built-in ways to accomplish things in the background, fully using multi-core processors. Different Approaches The following are the two different approaches for parallel data processing in Java − Using Java Streams API Using Arrays.parallelSort() Why Parallel Processing? Parallel data processing is essential in scenarios where − Processing large datasets is necessary to happen ... Read More
In this article, we will learn about multidimensional collections in Java. These collections offer dynamic resizing, flexible data storage, and better memory management compared to traditional arrays. What are Multidimensional collections? Multidimensional collections are also known as Nested collections. It is a group of objects wherein every group has any number of objects that can be created dynamically. They can be stored in any position as well. In the case of arrays, the user would be bound to a specific number of rows and columns, hence multidimensional structure helps create and add elements dynamically. Different Approaches The following are the ... Read More
Docker has changed the way we develop, package, and run applications by providing a means of packaging applications and their dependencies into lightweight containers. However, it is just as important to ensure that your containers are healthy and running as it is to get them deployed. This is where Docker Health Checks come in. Why Do We Need Docker Health Checks? When you are running your applications in Docker containers, just checking whether the container is ‘running’ is not enough. A container can be started, but may be stuck in an infinite loop, waiting for a connection, or experiencing ... Read More
When working with strings in Python, you might often find the need to remove specific characters. This could be driven by various needs such as data cleaning, formatting, or simply modifying text for output. Below are several methods to remove specific characters from a string. Using str.replace() Using a Loop Using str.translate() Using List Comprehension Using 'str.replace()' Method The simplest way to remove specific characters from a string is to use the str.replace() method. This method allows you to replace occurrences of ... Read More