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Articles by Ankith Reddy
Page 8 of 73
C++ Program to Implement Sparse Matrix
A sparse matrix is a matrix in which majority of the elements are 0. An example for this is given as follows.The matrix given below contains 5 zeroes. Since the number of zeroes is more than half the elements of the matrix, it is a sparse matrix.5 0 0 3 0 1 0 0 9A program to implement a sparse matrix is as follows.Example#include using namespace std; int main () { int a[10][10] = { {0, 0, 9} , {5, 0, 8} , {7, 0, 0} }; int i, j, count = 0; int row = 3, col = 3; for (i = 0; i < row; ++i) { for (j = 0; j < col; ++j){ if (a[i][j] == 0) count++; } } cout
Read MoreC# Linq FirstorDefault Method
Use the FirstorDefault() method to return the first element of a sequence or a default value if element isn’t there.The following is our empty list −List val = new List { };Now, we cannot display the first element, since it is an empty collection. For that, use the FirstorDefault() method to display the default value.val.AsQueryable().FirstOrDefault();The following is the complete example.Exampleusing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { List val = new List { }; double d = val.AsQueryable().FirstOrDefault(); Console.WriteLine("Default Value = "+d); ...
Read MoreHow to use the GetValue() method of array class in C#?
The GetValue() method of array class in C# gets the value at the specified position in the one-dimensional Array. The index is specified as a 32-bit integer.We have set the array values first using the Array.CreateInstance method.Array arr = Array.CreateInstance(typeof(String), 3, 6); arr.SetValue("One", 0, 0); arr.SetValue("Two", 0, 1); arr.SetValue("Three", 0, 2); arr.SetValue("Four", 0, 3); arr.SetValue("Five", 1, 4); arr.SetValue("Six", 1, 5); arr.SetValue("Seven", 1, 2); arr.SetValue("Eight", 1, 3);Then loop throught the array length. This will display all the values using the GetValue() method.for (int i = 0; i < a; i++) for (int j = 0; j < b; j++) Console.WriteLine( arr.GetValue(i, ...
Read MoreDump the content of an array in Java
An array can be easily printed by using the method java.util.Arrays.toString() in Java. This method returns a string representation of the array contents that is enclosed in square brackets. If the array is null, then this method returns null.A program that demonstrates this is given as follows −Exampleimport java.util.Arrays; public class Demo { public static void main(String args[]) { String str[] = {"John", "Harry", "Sally", "Emma", "Peter"}; System.out.println("The array content is:"); System.out.println(Arrays.toString(str)); } }OutputThe array content is: [John, Harry, Sally, Emma, Peter]Now let us understand the above program.The string ...
Read MoreC# Program to return the only element that satisfies a condition
The Single() method returns the only element that satisfies a condition. If more than one such element is visible, then an error is thrown.The following is our string array.string[] str = { "jack", "tom", "henry", "time"};Now, use the Single() method to get each element. Then, we have used Lambda Expression to calculate an element whose length is greater than four.str.AsQueryable().Single(name => name.Length > 4);Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { string[] str = { "jack", "tom", "henry", "time"}; // finding string whose length is greater ...
Read MoreC# Program to return the difference between two sequences
Set two sequences.double[] arr1 = { 10.2, 15.6, 23.3, 30.5, 50.2 }; double[] arr2 = { 15.6, 30.5, 50.2 };To get the difference between both the above arrays, use Except() method.IEnumerable res = arr1.AsQueryable().Except(arr2);The following is the complete code.Exampleusing System; using System.Linq; using System.Collections.Generic; class Demo { static void Main() { double[] arr1 = { 10.2, 15.6, 23.3, 30.5, 50.2 }; double[] arr2 = { 15.6, 30.5, 50.2 }; Console.WriteLine("Initial List..."); foreach(double ele in arr1) { Console.WriteLine(ele); } IEnumerable res = arr1.AsQueryable().Except(arr2); Console.WriteLine("New List..."); foreach (double a in res) { Console.WriteLine(a); } } }OutputInitial List... 10.2 15.6 23.3 30.5 50.2 New List... 10.2 23.3
Read MoreC# Linq ThenBy Method
Orders elements in a sequence using ThenBy() method.We have the following string array.string[] str = { "AAA", "AAAA", "A", "AAAAA", "AAAAAAAAA" };Now, use Lambda Expressions and set a condition inside the ThenBy() method to sort the strings according to the number of characters they have.IEnumerable res = str.AsQueryable() .OrderBy(alp => alp.Length).ThenBy(alp => alp);Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { string[] str = { "AAA", "AAAA", "A", "AAAAA", "AAAAAAAAA" }; IEnumerable res = str.AsQueryable() .OrderBy(alp => alp.Length).ThenBy(alp => alp); foreach (string arr in ...
Read MoreGet bounds of a C# three-dimensional array
To get the bounds of a three-dimensional array, use the GetUpperBound() GetLowerBound() methods in C#.The parameter to be set under these methods is the dimensions i.e.Let’s say our array is −int[, , ] arr = new int[3, 4, 5];For a three-dimensional arrays, dimension 0.arr.GetUpperBound(0) arr.GetLowerBound(0)For a three-dimensional arrays, dimension 1.arr.GetUpperBound(1) arr.GetLowerBound(1)For a three-dimensional arrays, dimension 2.arr.GetUpperBound(2) arr.GetLowerBound(2)Let us see the entire example.Exampleusing System; class Program { static void Main() { int[, , ] arr = new int[3, 4, 5]; Console.WriteLine("Dimension 0 Upper Bound: {0}", arr.GetUpperBound(0).ToString()); Console.WriteLine("Dimension 0 Lower Bound: {0}", ...
Read MoreImplicit conversion from Byte to Decimal in C#
Byte represents an 8-bit unsigned integer.Implicit conversion of an 8-bit unsigned integer (Byte) to a Decimal is possible. Let us see how.Here’s our Byte value.byte val = 16;To implicitly convert, just assign the value as shown below −decimal dec; dec = val;Let us see the complete example.Exampleusing System; public class Demo { public static void Main() { byte val = 16; decimal dec; // implicit dec = val; Console.WriteLine("Decimal ="+dec); } }OutputDecimal =16
Read MoreCheck for the availability of a package in Java
The availability can be checked using the method java.lang.Class.forName(). The class object associated with the class with the given string name can be returned using the method java.lang.Class.forName(String name, boolean initialize, ClassLoader loader), using the class loader that is used to load the class.A program that demonstrates this is given as follows −Examplepublic class Main { public static void main(String args[]) { System.out.println(Availability("java.lang.String")); } public static boolean Availability(String name) { boolean flag = false; try { Class.forName(name, false, null); flag ...
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