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To access Array elements in a foreach statement, use the numeric index.Let’s say the following is our code.Example Live Demousing System; namespace ArrayApplication { class MyArray { static void Main(string[] args) { int [] n = new int[10]; /* n is an array of 10 integers */ /* initialize elements of array n */ for ( int i = 0; i < 10; i++ ) { n[i] = i + 100; } ... Read More
A Singleton pattern states that a class can have a single instance and multiple instances are not permitted to be created. For this purpose, we make the constructor of the class a private and return a instance via a static method. But using serialization, we can still create multiple instance of a class. See the example below −Example - Breaking Singleton Live Demoimport java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; public class Tester{ public static void main(String[] args) throws ClassNotFoundException, IOException{ A a = A.getInstance(); A b ... Read More
The ‘for loop’ executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.The following is our for loop.Example Live Demousing System; namespace ArrayApplication { class MyArray { static void Main(string[] args) { int [] n = new int[10]; /* n is an array of 10 integers */ int i, j; /* initialize elements of array n */ for ( i = 0; i < 10; i++ ) { n[ ... Read More
This is the default mechanism for passing parameters to a method. In this mechanism, when a method is called, a new storage location is created for each value parameter.The values of the actual parameters are copied into them. Hence, the changes made to the parameter inside the method have no effect on the argument. The following is the code to pass parameters by value.Example Live Demousing System; namespace CalculatorApplication { class NumberManipulator { public void swap(int x, int y) { int temp; temp = x; /* save the value ... Read More
The continue statement causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.The continue statement in C# works somewhat like the break statement. Instead of forcing termination, however, continue forces the next iteration of the loop to take place, skipping any code in between.For the while loop, continue statement causes the program control passes to the conditional tests.The following is the complete code to use continue statement in a while loop.Example Live Demousing System; namespace Demo { class Program { static void Main(string[] args) { ... Read More
If a object is no more referenced by a live reference then it becomes eligible for garbage collection. See the example below −Examplepublic class Tester{ public static void main(String[] args) { test(); } public static void test(){ A a = new A(); } } class A {}When test() method complete execution, the a object is no more referenced and is eligible for garbage collection. Java garbage collector will deallocate the object when it runs.To prevent garbage collection, we can create a static reference to an object and then ... Read More
A foreach loop is used to execute a statement or a group of statements for each element in an array or collection.It is similar to for Loop; however, the loop is executed for each element in an array or group. Therefoe, the index does not exist in it.Let us see an example of Bubble Sort, wherein after sorting the elements, we will display the elements using the foreach loop.Example Live Demousing System; namespace BubbleSort { class MySort { static void Main(string[] args) { int[] arr = { 78, 55, 45, 98, 13 }; int temp; for (int j = 0; j
A Singleton pattern states that a class can have a single instance and multiple instances are not permitted to be created. For this purpose, we make the constructor of the class a private and return a instance via a static method. But using cloning, we can still create multiple instance of a class. See the example below −Example - Breaking Singletonpublic class Tester{ public static void main(String[] args) throws CloneNotSupportedException { A a = A.getInstance(); A b = (A)a.clone(); System.out.println(a.hashCode()); System.out.println(b.hashCode()); } } ... Read More
Set the list of dictionaries with keys and values.var d = new Dictionary(); d.Add("Zack", 0); d.Add("Akon", 3); d.Add("Jack", 2); d.Add("Tom", 1);Get and sort the keys.var val = d.Keys.ToList(); val.Sort();You can try to run the following code to sort a list of dictionaries by values.Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { var d = new Dictionary(); d.Add("Zack", 0); d.Add("Akon", 3); d.Add("Jack", 2); d.Add("Tom", 1); // Acquire keys and sort them. var val ... Read More
Set the string you want to split.string str = "Hello World!";Use the split() method to split the string into separate elements.string[] res = str.Split(' ');The following is the complete code to split a string into elements of a string array in C#.Example Live Demousing System; class Demo { static void Main() { string str = "Hello World!"; string[] res = str.Split(' '); Console.WriteLine("Separate elements:"); foreach (string words in res) { Console.WriteLine(words); } } }OutputSeparate elements: Hello World!