To get all elements of a List that match the conditions specified by the predicate, the code is as follows −Exampleusing System; using System.Collections.Generic; public class Demo {    private static bool demo(int i) {       return ((i % 3) == 0);    }    public static void Main(String[] args) {       List list = new List();       list.Add(9);       list.Add(15);       list.Add(20);       list.Add(40);       list.Add(50);       list.Add(60);       Console.WriteLine("List elements...");       foreach (int i in list) {   ... Read More

To get hash code for the specified key of a Hashtable, the code is as follows −Example Live Demousing System; using System.Collections; public class HashCode : Hashtable {    public static void Main(string[] args) {       HashCode hash = new HashCode();       hash.Add("A", "Jacob");       hash.Add("B", "Mark");       hash.Add("C", "Tom");       hash.Add("D", "Nathan");       hash.Add("E", "Tim");       hash.Add("F", "John");       hash.Add("G", "Gary");       Console.WriteLine("Key and Value pairs...");       foreach(DictionaryEntry entry in hash) {          Console.WriteLine("{0} and {1} ", ... Read More

To get synchronize access to the ListDictionary, the code is as follows −Example Live Demousing System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main() {       ListDictionary dict = new ListDictionary();       dict.Add("1", "SUV");       dict.Add("2", "Sedan");       dict.Add("3", "Utility Vehicle");       dict.Add("4", "Compact Car");       dict.Add("5", "SUV");       dict.Add("6", "Sedan");       dict.Add("7", "Utility Vehicle");       dict.Add("8", "Compact Car");       dict.Add("9", "Crossover");       dict.Add("10", "Electric Car");       Console.WriteLine("ListDictionary elements...");       ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> Value int    -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(78); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(89); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(98); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(58); Query OK, 1 row affected (0.25 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentMarks int    -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command. We have also inserted duplicate records −mysql> insert into DemoTable(StudentMarks) values(98); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(StudentMarks) values(98); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentMarks) values(78); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentMarks) values(78); Query OK, 1 row affected (0.29 sec) mysql> insert ... Read More

To insert data from one table to another, use the INSERT INTO SELECT statement. Let us first create a table −mysql> create table DemoTable1    -> (    -> Id int,    -> FirstName varchar(20)    -> ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(101, 'Adam'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1 values(102, 'John'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will produce the following output −+------+-----------+ | Id   ... Read More

To get the HashCode for the current UInt32 instance, the code is as follows −Example Live Demousing System; public class Demo {    public static void Main() {       uint val1 = 100;       uint val2 = UInt16.MinValue;       Console.WriteLine("HashCode for val1 = "+val1.GetHashCode());       Console.WriteLine("HashCode for val2 = "+val2.GetHashCode());    } }OutputThis will produce the following output −HashCode for val1 = 100 HashCode for val2 = 0ExampleLet us see another example − Live Demousing System; public class Demo {    public static void Main() {       uint val1 = 50;   ... Read More

Let us see an example to use foreach loop in arrays −Example Live Demousing System; public class Demo {    public static void Main() {       string[] products = new string[] { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };       Console.WriteLine("Products list...");       foreach(string s in products) {          Console.WriteLine(s);       }       Console.WriteLine("Is the products Accessories in the array? = {0}", Array.Exists(products, ele => ele == "Accessories"));       Console.WriteLine("Is the products Stationery in the array? = {0}", Array.Exists(products, ele => ele == "Stationery"));     ... Read More

To get the angle whose sine is float value argument, the code is as follows −Exampleusing System; public class Demo {    public static void Main() {       float val1 = 0.1f;       float val2 = 8.9f;       Console.WriteLine("Angle (val1) = "+(MathF.Asin(val1)));       Console.WriteLine("Angle (val2) = "+(MathF.Asin(val2)));    } }OutputThis will produce the following output −Angle (val1) = 0.1001674 Angle (val2) = NaNExampleLet us see another example −using System; public class Demo {    public static void Main() {       float val1 = 1.2f;       float val2 = ... Read More

To get the hyperbolic arc-cosine of a floating-point value, the code is as follows −Exampleusing System; public class Demo {    public static void Main() {       float val1 = 0.1f;       float val2 = 0.9f;       Console.WriteLine("Angle (val1) = "+(MathF.Acosh(val1)));                                 Console.WriteLine("Angle (val2) = "+(MathF.Acosh(val2)));    } }OutputThis will produce the following output −Angle (val1) = NaN Angle (val2) = NaNExampleLet us see another example −using System; public class Demo {    public static void Main() {       float val1 = 5.1f;       float val2 = 8.9f;       Console.WriteLine("Angle (val1) = "+(MathF.Acosh(val1)));       Console.WriteLine("Angle (val2) = "+(MathF.Acosh(val2)));    } }OutputThis will produce the following output −Angle (val1) = 2.312634 Angle (val2) = 2.876027