Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
To get the creation time of a file in C#, use the CreationTime() method.For this, use the FileInfo as well as DateTime classes.Create an object of each −FileInfo file = new FileInfo("new.txt"); DateTime dt = file.CreationTime;Let us see the complete code −Example Live Demousing System.IO; using System; public class Program { public static void Main() { using (StreamWriter sw = new StreamWriter("qa.txt")) { sw.WriteLine("Questions and Answers!"); } FileInfo file = new FileInfo("qa.txt"); // file creation time DateTime dt = file.CreationTime; Console.WriteLine(dt); } }Output9/5/2018 5:20:03 AM
To declare optional function parameters in JavaScript, use the “default” arguments.ExampleYou can try to run the following code to declare optional parameters − // default is set to 1 function inc(val1, inc = 1) { return val1 + inc; } document.write(inc(10,10)); document.write(""); document.write(inc(10));
Set lowercase suffixes for literals such as u, l, ul, f, etc.// l for long long a = 29876l;It can be used on literal numbers as well. It tells the compiler that the literal is of a specific type.The following is an example −Example Live Demousing System.IO; using System; public class Program { public static void Main() { long a = 29876l; float b = 95.10f; Console.WriteLine(a); Console.WriteLine(b); } }On running the above example, you will get the following output. With that, you will also get a ... Read More
The Function() constructor expects any number of string arguments. The last argument is the body of the function - it can contain arbitrary JavaScript statements, separated from each other by semicolons.ExampleYou can try to run the following code to invoke a function with new Function Constructor − var func = new Function("x", "y", "return x*y;"); function multiplyFunction(){ var result; result = func(15,35); document.write ( result ); } Click the following button to call the function
To specify number types, use suffixes in C#. Literal number suffixes are numeric suffixes.For example, for long type −// long suffix long val1 = 29345L;For double type −// double suffix double val2 = 297.325D; Console.WriteLine(val2);Let us see more examples −Example Live Demousing System.IO; using System; public class Program { public static void Main() { // long suffix long val1 = 29345L; Console.WriteLine(val1); // decimal suffix decimal val5 = 3245.5678M; Console.WriteLine(val5); // double suffix double val2 = 297.325D; Console.WriteLine(val2); // float suffix float val3 = 250.35F; Console.WriteLine(val3); // unsigned suffix uint val4 = 3456U; Console.WriteLine(val4); } }Output29345 3245.5678 297.325 250.35 3456
ElementAt() is a System.Linq method in C# that is used to get and display element at a particular index.The following is our string array −string[] arr = { "One", "Two", "Three", "Four", "Five" };Now to get an element at index 0, use the ElementAt() method −arr.ElementAt(0);The following is the complete code −Example Live Demousing System.IO; using System; using System.Linq; public class Demo { public static void Main() { string[] arr = { "One", "Two", "Three", "Four", "Five" }; // displaying element at index 0 string res = arr.ElementAt(0); Console.WriteLine(res); } }OutputOne
If you want to skip a number of elements in an array, then use the Skip() method in C#.Let’s say the following is our array −int[] arr = { 24, 40, 55, 62, 70, 82, 89, 93, 98 };Now to skip first four elements −var ele = arr.Skip(4);Let us see the complete example −Example Live Demousing System.IO; using System; using System.Linq; public class Demo { public static void Main() { int[] arr = { 24, 40, 55, 62, 70, 82, 89, 93, 98 }; Console.WriteLine("Initial Array..."); foreach (var res in arr) ... Read More
SkipWhile skips an element when a condition is matched.For example, use the following if you want to skip all even elements −ele => ele %2 == 0The following is an example wherein all the even elements are skipped and only the odd elements are displayed −Example Live Demousing System.IO; using System; using System.Linq; public class Demo { public static void Main() { int[] arr = { 20, 35, 55 }; Console.WriteLine("Initial array..."); foreach (int value in arr) { Console.WriteLine(value); } // ... Read More
Declare an array −int[] arr = { 10, 90, 20, 19, 99, 57 };Now to get the largest element from an array, use Max() method with lambda expressions −arr.Max());Here is the complete code −Example Live Demousing System; using System.Linq; class Demo { static void Main() { int[] arr = { 10, 90, 20, 19, 99, 57 }; Console.WriteLine(arr.Max(element => Math.Abs(element))); } }Output99
In JavaScript, the functions wrapped with parenthesis are called “Immediately Invoked Function Expressions" or "Self Executing Functions.The purpose of wrapping is to the namespace and control the visibility of member functions. It wraps the code inside a function scope and decreases clashing with other libraries. This is what we call Immediately Invoked Function Expression (IIFE) or Self Executing Anonymous Function.SyntaxHere’s the syntax −(function() { // code })();As you can see above, the following pair of parentheses converts the code inside the parentheses into an expression −function(){...}In addition, the next pair, i.e. the second pair of parentheses continues the operation. ... Read More