Skip to main content

Popular posts from this blog

Difference between NPM and NPX

NPM Vs NPX npm  - Javascript package manager npx  - Execute npm package binaries https://docs.npmjs.com/files/folders#executables If you use  npm 5.1 or earlier , you can't use npx. Instead, install create-react-app globally: npm install -g create-react-app Now you can run: create-react-app my-app NPM: One might install a package locally on a certain project: npm install some - package Now let's say you want NodeJS to execute that package from the command line: $ some - package The above will  fail . Only  globally installed  packages can be executed by typing their name  only . To fix this, and have it run, you must type the local path: $ ./ node_modules /. bin / some - package You can technically run a locally installed package by editing your  packages.json  file and adding that package in the  scripts  section: { "name" : "whatever" , "version" : "1.0.0" , "scripts" : { ...
Post a Comment
Read more

Asp.Net MVC Life Cycle

MVC Life Cycle: 1. Routing -         Routing is the first step in ASP.NET MVC pipeline. Typically, it is a pattern matching system that matches the incoming request to the registered URL patterns in the Route Table. The UrlRoutingModule(System.Web.Routing.UrlRoutingModule) is a class which matches an incoming HTTP request to a registered route pattern in the RouteTable(System.Web.Routing.RouteTable). 2.Controller Initialization -        The MvcHandler initiates the real processing inside ASP.NET MVC pipeline by using ProcessRequest method. This method uses the IControllerFactory instance (default is System.Web.Mvc.DefaultControllerFactory) to create corresponding controller. 3. Action Execution – Action execution occurs in the following steps:        When the controller is initialized, the controller calls its own InvokeAction() method by passing the details of the chosen action method. This is han...
Post a Comment
Read more

C# IEnumerable and IQueryable

The first important point to remember is IQueryable interface inherits from IEnumerable, so whatever IEnumerable can do, IQueryable can also do.   There are many differences but let us discuss about the one big difference which makes the biggest difference. IEnumerable interface is useful when your collection is loaded using LINQ or Entity framework and you want to apply filter on the collection. Consider the below simple code which uses IEnumerable with entity framework. It’s using a Wherefilter to get records whose EmpId is 2. EmpEntities ent = new EmpEntities(); IEnumerable<Employee> emp = ent.Employees;  IEnumerable<Employee> temp = emp.Where(x => x.Empid == 2).ToList<Employee>(); This where filter is executed on the client side where the IEnumerable code is. In other words all the data is fetched from the database and then at the client its scans and gets the record with EmpId is 2.   But now see the below code we have...
Post a Comment
Read more