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Hashing is the process of generating a value from a text or a list of numbers using a mathematical function known as a hash function.There are many hash functions that use numeric numeric or alphanumeric keys. Different hash functions are given below:Hash FunctionsThe following are some of the Hash Functions −Division MethodThis is the easiest method to create a hash function. The hash function can be described as −h(k) = k mod nHere, h(k) is the hash value obtained by dividing the key value k by size of hash table n using the remainder. It is best that n is ... Read More
For volume and surface area of a sphere, firstly declare a variable with the value of radius.int r = 15;Get the volume f the sphere.// calculating volume of sphere cal_volume = (4.0 / 3) * (22 / 7) * r * r * r;Now the surface area of the sphere is calculated −cal_area = 4 * (22 / 7) * r * r;Let us see the complete code −Example Live Demousing System; using System.Collections.Generic; public class Demo { public static void Main(string[] args) { double cal_area, cal_volume, r; // radius ... Read More
Declare and initialize a list.var products = new List (); products.Add("Accessories"); products.Add("Clothing"); products.Add("Footwear");To get the size, use the Capacity property.products.CapacityNow let us see the complete code to find the size of a list.Example Live Demousing System; using System.Collections.Generic; public class Demo { public static void Main(string[] args) { var products = new List (); products.Add("Accessories"); products.Add("Clothing"); products.Add("Footwear"); Console.WriteLine("Our list...."); foreach(var p in products) { Console.WriteLine(p); } Console.WriteLine("Size of list = " + products.Capacity); } }OutputOur list.... Accessories Clothing Footwear Size of list = 4
To find whether a number is divisibe by 2 is not, check what happens when the number is divisible by 2.If the remainder is 0, then the number is divisible by 2, else it is false −if (num % 2 == 0) { Console.WriteLine("Divisible by 2 "); } else { Console.WriteLine("Not divisible by 2"); }The following is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { class Test { static void Main(string[] args) { int num; num = 18; ... Read More
Let’s say our string is −String s = "HeathLedger!";Now create a new array.int []cal = new int[maxCHARS];Create a new method and pass both the string and the new array in it. Find the maximum occurrence of a character.static void calculate(String s, int[] cal) { for (int i = 0; i < s.Length; i++) cal[s[i]]++; }Let us see the complete code −Example Live Demousing System; class Demo { static int maxCHARS = 256; static void calculate(String s, int[] cal) { for (int i = 0; i < s.Length; i++) cal[s[i]]++; } ... Read More
In C#, use readonly to declare a const array.public static readonly string[] a = { "Car", "Motorbike", "Cab" };In readonly, you can set the value at runtime as well unlike const.Another alternative of achieving what we saw above −public ReadOnlyCollection a { get { return new List { "Car", "Motorbike", "Cab" }.AsReadOnly();}} .NET framework 4.5 brings an improvement to what we saw −public ReadOnlyCollection a { get; } = new ReadOnlyCollection( new string[] { "Car", "Motorbike", "Cab" } );
Let’s say our string is −string str = "abcd$ef$gh";To replace the special character, use the Replace() method.string res = str.Replace('$', 'k');The following is the complete code to replace character from a string −Example Live Demousing System; public class Program { public static void Main() { string str = "abcd$ef$gh"; Console.WriteLine("Initial string = " + str); string res = str.Replace('$', 'k'); // after replacing Console.WriteLine("Replaced string = " + res.ToString()); } }OutputInitial string = abcd$ef$gh Replaced string = abcdkefkgh
Use the Replace() method to replace a character with asterisks.Let’s say our string is −string str = "dem* text";To replace it, use the Replace() method −str.Replace('*', 'o');Here is the complete code −Example Live Demousing System; public class Program { public static void Main() { string str = "dem* text"; Console.WriteLine("Initial string = " + str); string res = str.Replace('*', 'o'); // after replacing Console.WriteLine("After replacing asterisk = " + res.ToString()); } }OutputInitial string = dem* text After replacing asterisk = demo text
The following is our integer array −int[] myArr = new int[6] { 8, 4, 2, 5, 9, 14 };Firstly, get the length of the array, and loop through the array to find the sum of the elements. After that, divide it with the length.int len = myArr.Length; int sum = 0; int average = 0; for (int i = 0; i < len; i++) { sum += myArr[i]; } average = sum / len;Here is the complete codeExample Live Demousing System; public class Program { public static void Main() { ... Read More
To get the first 10 characters, use the substring() method.Let’s say the following is our string −string str = "Cricket is a religion in India!";Now to get the first 10 characters, set the value 10 in the substring() method as shown below −string res = str.Substring(0, 10);Let us see the complete code.Example Live Demousing System; public class Demo { public static void Main() { string str = "Cricket is a religion in India!"; string res = str.Substring(0, 10); Console.WriteLine(res); } }OutputCricket is