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Liskov Substitution Principle

Why to use LSP Scenario: Suppose we have 3 databases (Mortgage Customers, Current Accounts Customers and Savings Account Customers) that provide customer data and we need customer details for given customer's last name. Now we may get more than 1 customer detail from those 3 databases against giv...

Html.Partial Vs Html.RenderPartial

Html.Partial returns a string on the other hand Html.RenderPartial returns void. Html.RenderPartial This method returns void and the result is directly written to the HTTP response stream. That means it uses the same TextWriter object used in the current webpage/template. For this reason, this me...

A private scope

When the scope is private, it can only be accessed from the current class or other instances of the current class. package com.example { class FooClass { private val x = "foo" def aFoo(otherFoo: FooClass) { otherFoo.x // <- Accessing from another instance of the sam...

A private package-specific scope

You can specify a package where the private value can be accessed. package com.example { class FooClass { private val x = "foo" private[example] val y = "bar" } class BarClass { val f = new FooClass f.x // <- Will not compile f.y // <- Wil...

Object private scope

The most restrictive scope is "object-private" scope, which only allows that value to be accessed from the same instance of the object. class FooClass { private[this] val x = "foo" def aFoo(otherFoo: FooClass) = { otherFoo.x // <- This will not compile, accessing x...

Changing path to the packages folder in Visual Studio solution

By default, NuGet restores packages into the packages folder in the solution root. This folder is shared between all solution projects. In some cases it is useful to change the location of the restored packages (for instance, to share them between several solutions). Its can be achieved by creating...

Parameter Validation

There are a variety of ways to validate parameter entry, in PowerShell. Instead of writing code within functions or scripts to validate parameter values, these ParameterAttributes will throw if invalid values are passed. ValidateSet Sometimes we need to restrict the possible values that a paramet...

Advanced Type Constraints

It's possible to specify several type constraints for generics using the where clause: func doSomething<T where T: Comparable, T: Hashable>(first: T, second: T) { // Access hashable function guard first.hashValue == second.hashValue else { return } // Access compa...

Switching specific events on and off via jQuery. (Named Listeners)

Sometimes you want to switch off all previously registered listeners. //Adding a normal click handler $(document).on("click",function(){ console.log("Document Clicked 1") }); //Adding another click handler $(document).on("click",function(){ console.log(&q...

Installing and running Redis Server on Windows

Note: The Redis project does not officially support Windows. However, the Microsoft Open Tech group develops and maintains this Windows port targeting Win64. Official redis.io/download You can choose to download different versions or the latest version of Redis github.com/MSOpenTech/redis/release...

Filter Functionality in Vuejs

<!doctype html> <html> <head> <title>Page Title</title> <meta charset="UTF-8"> <meta name="viewport" content="initial-scale=1.0"> <script src="vue.js"></script> <style> ...

Tab functionality in VueJs

<!doctype html> <html> <head> <title>Page Title</title> <meta charset="UTF-8"> <meta name="viewport" content="initial-scale=1.0"> <script src="vue.js"></script> <style> ...

Moving between panes

To move between panes, follow prefix with movement keys ie, ctrlb followed by corresponding arrow keys                        ▲ ctrlb ◀        ▶                        ▼

Generating directives

To add a directive with a selector [prefix]Highlight, run: $ ng g d highlight installing directive create src/app/highlight.directive.spec.ts create src/app/highlight.directive.ts update src/app/app.module.ts To prevent prefix usage add --prefix false or -p false flag ...

Generating services

To add a service with a name UserService, run: $ ng g s user installing service create src/app/user.service.spec.ts create src/app/user.service.ts To prevent .spec files creation add --spec false or -sp false flag $ ng g s user --spec false installing service ...

Dependency Inversion Principle C#

To understand Dependency Inversion Principle (DIP) we need to clear concept about Inversion Of Control(IOC) and Dependency Injection(DI). So here we discuss all about the terms with Dependency Inversion Principle (DIP). Inversion Of Control(IOC) : The control or logic which is not the part of t...

Posting JavaScript objects with jQuery Ajax Call

Ajax calls, request and retrieve data for giving the user a sense of a better interactive user interface experience. This article will show you how to use jQuery and send data through Ajax calls. For this example, we’re going to POST the following JavaScript object to our server. var post = { ...

Contact Form In Asp MVC

1. Model : public class ContactModel { [Required, Display(Name="Sender Name")] public string SenderName { get; set; } [Required, Display(Name = "Sender Email"), EmailAddress] public string SenderEmail { get; set; } [Required] public string Messag...

async.series(To handle events one by one)

/In async.series,all the functions are executed in series and the consolidated outputs of each function is passed to the final callback. e.g/ var async = require('async'); async.series([ function (callback) { console.log('First Execute..'); callback(null, 'userPersonalData'); }, function (cal...

RDBMS Vs Graph Database

RDBMSGraph DatabaseTablesGraphsRowsNodesColumns and DataProperties and its valuesConstraintsRelationshipsJoinsTraversal

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