Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
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.Example Live Demousing 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
To match any string containing zero or more p’s with JavaScript RegExp, use the p* Quantifier.ExampleYou can try to run the following code to match any string containing zero or more p’s. Here, p is considered as a number of occurrences − JavaScript Regular Expression var myStr = "Welcome! Wweeeelcome to our website!"; var reg = /el*/g; var match = myStr.match(reg); document.write(match);
To match any string containing a sequence of N p’s with JavaScript RegExp, use the p{N} Quantifier.ExampleYou can try to run the following code to match any string containing a sequence of N p’s − JavaScript Regular Expression var myStr = "Welcome 1, 100, 10000, 1000"; var reg = /\d{3}/g; var match = myStr.match(reg); document.write(match);
Find the sum of elements using the Linq Sum() method.Here’s our list with integer elements.List list = new List { 99, 34, 77, 75, 87, 35, 88};Now find the sum using the Sum() method.list.AsQueryable().Sum();The following is an example to find the sum of elements of a list with integer elements.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { List list = new List { 99, 34, 77, 75, 87, 35, 88}; int res = list.AsQueryable().Sum(); Console.WriteLine("Sum = {0}", res); } }OutputSum = 495
Firstly, set a sequence.List myList = new List { 1, 2, 3, 4 ,5};Now find the sum using the Queryable Sum() method.myList.AsQueryable().Sum();Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { List myList = new List { 1, 2, 3, 4 ,5}; Console.WriteLine("Sum of elements in a list..."); foreach (int res in myList) { Console.WriteLine(res); } int sum = myList.AsQueryable().Sum(); Console.WriteLine("Sum = {0}", sum); } }OutputSum of elements in a list... 1 2 3 4 5 Sum = 15
To add properties and methods to an object in JavaScript, use the prototype property.ExampleYou can try to run the following code to learn how to work with prototype − JavaScript prototype property function book(title, author) { this.title = title; this.author = author; } var myBook = new book("Amit", "Java"); book.prototype.price = null; myBook.price = 500; document.write("Book title is : " + myBook.title + ""); document.write("Book author is : " + myBook.author + ""); document.write("Book price is : " + myBook.price + "");
Get specified number of elements from the beginning using the Take() method.The following is our array.int[] marks = { 35, 72, 50, 90, 95, 85, 52, 67 };Now, use OrderByDescending to order the elements in Descending order. Then use the Take() method to get the elements.marks.AsQueryable().OrderByDescending(s => s).Take(5);Let us see the complete example.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { int[] marks = { 35, 72, 50, 90, 95, 85, 52, 67 }; // top 5 student marks IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Take(5); foreach (int res in selMarks) { Console.WriteLine(res); } } }Output95 90 85 72 67
Get specified number of elements from the end using the TakeLast() method.The following is our array.int[] pages = { 492, 290, 129, 602, 152 };Now, use OrderBy to order the elements in ascending order. Then use the TakeLast() method to get specified number of elements from the end.marks.AsQueryable().OrderByDescending(s => s).Take(5);Let us see the complete example.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { // pages of books int[] pages = { 492, 290, 129, 602, 152 }; // get pages of last two ... Read More
Use the reduceRight() method in JavaScript to apply a function simultaneously against two values of the array from right-to-left as to reduce it to a single value.The following are the parameters −callback − Function to execute on each value in the array.initialValue − Object to use as the first argument to the first call of the callbackExampleYou can try to run the following code to learn how to work with reduceRight() method in JavaScript − JavaScript Array reduceRight Method if (!Array.prototype.reduceRight) ... Read More
Get elements as long as the condition is true in a sequence using the TakeWhile() method.The following is our list with strings.IList str = new List(){ "Car", "Bus", "Truck", "Airplane"};Now, let’s say we need the strings whose length is less than 4. For that, use Lambda Expressions and add it as a condition in the TakeWhile() method.str.TakeWhile(a => a.Length < 4);Here is the example that displays elements until the condition is trie.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { IList str = new List(){ "Car", "Bus", "Truck", "Airplane"}; ... Read More