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JavaScript provides a way to validate form's data on the client's computer before sending it to the web server. Basic form validation includes the form to be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data.ExampleYou can try to run the following code to implement basic form validation in JavaScript − Form Validation // Form validation function validate(){ if( document.myForm.Name.value ... Read More
C# Generics and C++ Templates provide support for parameterized types. The following are the differences −FlexibilityC++ Templates are more flexible than C# GenericsExplicit specializationExplicit specialization is not supported by C#Type ParameterThe type parameter cannot be used as the base class for the generic type in C#C# does not allow type parameters to have default types.Run-TimeThe C++ template has a compile-time modal, whereas C# Generics is both compile and run-time. Generics have run-time support.Non-type template parametersC#Templates will not allow non-type template parameters.Partial SpecializationC# does not even support partial specialization.
C# is a modern, general-purpose, object-oriented programming language developed by Microsoft and approved by European Computer Manufacturers Association (ECMA) and International Standards Organization (ISO).C# is designed for Common Language Infrastructure (CLI), which consists of the executable code and runtime environment that allows the use of various high-level languages on different computer platforms and architectures.Advantages of C#Object-Oriented LanguageAutomatic Garbage CollectionCross PlatformBackward CompatibilityBetter Integrity and InteroperabilityApplications of C#Games using UnityWeb Applications Client-Server ApplicationsWindows Applications Applications that run on desktopsWeb Services ApplicationsConsole ApplicationsClass Libraries
The onerror event handler was the first feature to facilitate error handling in JavaScript. The error event is fired on the window object whenever an exception occurs on the page.ExampleYou can try to run the following code to implement onerror() method in JavaScript − Click the following to see the result:
In C#, you can use the comma to declare more than one local variable in a statement. The following displays the same −int a = 20, b = 70, c = 40, d = 90;ExampleLet us see an example in which we are declaring multiple local variables. Below four variable is declared and initialized in the same statement.Live Demousing System; class Demo { static void Main() { int a = 20, b = 70, c = 40, d = 90; Console.WriteLine("{0} {1} {2} {3}", a, b, c, d); } }Output20 70 40 90
Use the StartWith() method in C# to check for URL in a String.Let us say our input string is −string input = "https://example.com/new.html";Now we need to check for www or non-www link. For this, use the if statement in C# −if (input.StartsWith("https://www.example.com") || input.StartsWith("https://example.com")) { }ExampleYou can try to run the following code to check for URL in a string.Live Demousing System; class Demo { static void Main() { string input = "https://example.com/new.html"; // See if input matches one of these starts. if (input.StartsWith("https://www.example.com") || input.StartsWith("https://example.com")) { ... Read More
To get the current time in a millisecond, use the date getMilliseconds() method. JavaScript date getMilliseconds() method returns the milliseconds in the specified date according to local time. The value returned by getMilliseconds() is a number between 0 and 999.Example You can try to run the following code to get the current time in milliseconds − JavaScript getMilliseconds() Method var dt = new Date( ); document.write("getMilliseconds() : " + dt.getMilliseconds() );
To calculate the area and perimeter of a circle, you can try to run the following code −Example JavaScript Example function Calculate(r) { this.r = r; this.perimeter = function () { return 2*Math.PI*this.r; }; this.area = function () { return Math.PI * this.r * this.r; }; } var calc = new Calculate(5); document.write("Area of Circle = ", calc.area().toFixed(2)); document.write("Perimeter of Circle = ", calc.perimeter().toFixed(2));
A regular expression is an object that describes a pattern of characters. The JavaScript RegExp class represents regular expressions, and both String and RegExp define methods that use regular expressions to perform powerful pattern-matching and search-and-replace functions on the text.A regular expression could be defined with the RegExp () constructor, as follows −var pattern = new RegExp(pattern, attributes); or simply var pattern = /pattern/attributes;The following are the parameters −pattern − A string that specifies the pattern of the regular expression or another regular expression.attributes − An optional string containing any of the "g", "i", and "m" attributes that specify global, ... Read More
To check for consecutive 1’s in a binary number, you need to check for 0 and 1.Firstly, set a bool array for 0s and 1s i.e. false and true −bool []myArr = {false, true, false, false, false, true, true, true};For 0, set the count to 0 −if (myArr[i] == false) count = 0;For 1, increment the count and set the result. The Max() method returns the larger of two number −count++; res = Math.Max(res, count);ExampleThe following is the example to check if there are K consecutive 1’s in a binary number −Live Demousing System; class MyApplication { static ... Read More