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In C#, converting a hexadecimal string to its numeric value is a common operation. Hexadecimal strings represent numbers in base 16 using digits 0-9 and letters A-F. C# provides several methods to convert hex strings to different numeric types depending on your needs. Syntax Following is the syntax for converting hex strings using different methods − Convert.ToInt32(hexString, 16) Convert.ToSByte(hexString, 16) int.Parse(hexString, NumberStyles.HexNumber) Using Convert.ToInt32() Method The most commonly used method is Convert.ToInt32() which converts a hex string to a 32-bit signed integer − using System; public class Program { ... Read More
In C#, you can find common elements between two lists using the Intersect() method from LINQ. This method returns an IEnumerable containing elements that appear in both lists, automatically removing duplicates. Syntax Following is the syntax for using the Intersect() method − IEnumerable result = list1.Intersect(list2); The method can also accept a custom equality comparer − IEnumerable result = list1.Intersect(list2, comparer); Using Intersect() with Integer Lists The most common use case is finding intersection between two integer lists − using System; using System.Collections.Generic; using System.Linq; class ... Read More
Converting a 2D array to a 1D array in C# involves flattening the multi-dimensional structure into a single-dimensional array. This process is commonly used in scenarios like matrix operations, data serialization, or when interfacing with APIs that expect 1D arrays. Using Nested Loops The most straightforward approach is using nested loops to iterate through the 2D array and copy elements to the 1D array − using System; class Program { static void Main(string[] args) { int[, ] a = new int[2, 2] {{1, ... Read More
To find a number in a string in C#, you can use Regular Expressions (Regex) from the System.Text.RegularExpressions namespace. The Regex pattern \d+ matches one or more consecutive digits in a string. Syntax Following is the syntax for creating a Regex pattern to match numbers − Regex regex = new Regex(@"\d+"); Match match = regex.Match(inputString); Following is the syntax for checking if a match was found − if (match.Success) { string number = match.Value; } Using Regex to Find the First Number The Match method ... Read More
A Heterogram is a string that contains no duplicate letters. Each character in the string appears exactly once. For example, words like "mobile", "cry", and "laptop" are heterograms because no letter is repeated. Examples of Heterograms mobile - No repeated letters cry - All unique letters laptop - Each letter appears once Algorithm The algorithm uses an integer array to track which letters have been encountered. For each character in the string − Convert the character to an array index using str[i] - ... Read More
The Convert.ToInt16 method in C# converts a specified value to a 16-bit signed integer (short). This method accepts various data types including double, string, boolean, and other numeric types, and returns a short value ranging from -32, 768 to 32, 767. When converting from floating-point numbers, the method performs rounding to the nearest integer. If the value is exactly halfway between two integers, it rounds to the even number. Syntax Following are the common overloads of the Convert.ToInt16 method − public static short ToInt16(double value); public static short ToInt16(string value); public static short ToInt16(bool value); ... Read More
The DateTimeOffset.AddYears() method in C# is used to add a specified number of years to a DateTimeOffset instance. This method returns a new DateTimeOffset object representing the date and time with the added years, while preserving the original offset from UTC. Syntax Following is the syntax for the DateTimeOffset.AddYears() method − public DateTimeOffset AddYears(int years); Parameters The method takes one parameter − years − An integer representing the number of years to add. Use positive values to add years, negative values to subtract years. Return Value ... Read More
A tuple in C# is a data structure that can hold multiple values of different types. Tuples are useful when you need to return multiple values from a method or group related data together without creating a separate class. C# provides two main ways to declare tuples: the classic Tuple class and the newer value tuples introduced in C# 7.0 with cleaner syntax. Syntax Classic tuple syntax − Tuple tuple = new Tuple(value1, value2); Value tuple syntax (C# 7.0+) − (int, string) tuple = (value1, value2); // or with named elements ... Read More
An anagram is a word or phrase formed by rearranging the letters of another word or phrase, using all the original letters exactly once. For example, "silent" and "listen" are anagrams because they contain the same letters in different arrangements. In C#, there are several approaches to check if two strings are anagrams. The most common method is to sort the characters of both strings and compare them for equality. Using Array.Sort() Method The simplest approach is to convert both strings to character arrays, sort them, and then compare the sorted arrays − ... Read More
The Convert.ToUInt16 method in C# converts a specified value to a 16-bit unsigned integer (ushort). This method can convert various data types including strings, integers, doubles, and other numeric types to a ushort value ranging from 0 to 65, 535. Syntax Following are the common overloads of the Convert.ToUInt16 method − public static ushort ToUInt16(string value); public static ushort ToUInt16(int value); public static ushort ToUInt16(double value); public static ushort ToUInt16(bool value); Parameters value − The value to convert to a 16-bit unsigned integer. Can be a string representation of a number, numeric ... Read More