Programming & AI Tips 💡

Send ETag headers in ASP.NET Core ✨ ASP.NET Core doesn’t add an ETag header automatically to HTTP responses from MVC action methods or Razor Pages. ❌ We have to implement that ourselves to provide the users with true Conditional GET support that honors the If-None-Match request header. ✅ Wouldn’t it be nice if all we had to do was to register it using app.UseETagger() like this❓ https://t.me/pgimg/88 [ Article ] : http://bit.do/etags 〰〰〰〰〰〰 #AspMvc #AspCore #ETag @ProgrammingTip

Quick Tip: How to pass visual alerts with an HTMLHelper⚠️ It will display a Bootstrap alert if there is a message passed through the ViewModel. 💥 This message can be a success, error, warning, or informational message. 🌈 The nice thing about the ViewMessage HtmlHelper is that if we don't pass it into our views, it won't display anything. 🎛 https://t.me/pgimg/87 [ Article ] : http://bit.do/alhl 〰〰〰〰〰〰 #AspMvc #CleanCode @ProgrammingTip

Xamarin VS Ionic VS React Native 🔥 Traditionally, Android applications are developed in Java, and iOS ones are written in Swift and Objective-C. ⚛️ Nevertheless, there exist plenty of other alternate tools that can be used instead. 👨🏻‍💻 Xamarin, React Native and Ionic are popular examples of such tools. 💎 What is their purpose❓ What makes them different❓ Which of them is the best❓ We’ll try to answer these questions in the article below. ⬇️ https://t.me/pgimg/86 [ Article ] : http://bit.do/cpfo 〰〰〰〰〰〰 #Xamarin #ReactNative #Ionic @ProgrammingTip

Writing CV 😂 〰〰〰〰〰〰 #Fun #NoSQL @ProgrammingTip

Passport.Js ⚡️ Passport is authentication middleware for Node.js. Extremely flexible and modular, Passport can be unobtrusively dropped in to any Express-based web application. 🔥 A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more. 🐦 https://t.me/pgimg/85 [ Website ] : passportjs.org 〰〰〰〰〰〰 #JavaScript #NodeJs #Authentication @ProgrammingTip

dbForge Event Profiler ⚡️ dbForge Event Profiler for SQL Server is a FREE tool that allows you to capture and analyze SQL Server events. ☁️ The events and data columns are stored in a physical trace file for later examination. 📋 You can use this information to identify and troubleshoot many SQL Server-related problems. 🐞 https://t.me/pgimg/83 [ Download ] : https://t.me/pgimg/84 [ Website ] : http://bit.do/dbfor 〰〰〰〰〰〰 #SQLServer #Profiler #DbForge @ProgrammingTip

JavaScript - Map vs. ForEach 🗺 What’s the difference between Map and ForEach in JavaScript❓ Let’s first take a look at the definitions on MDN 🌀 : • forEach() ➖ executes a provided function once for each array element. • map() ➖ creates a new array with the results of calling a provided function on every element in the calling array. What exactly does this mean❔ https://t.me/pgimg/81 [ Article ] : http://bit.do/mapjs 〰〰〰〰〰〰 #JavaScript #ForEach #Map @ProgrammingTip

Keyv 🗂 Keyv provides a consistent interface for key-value storage across multiple backends via storage adapters. ⚡️ It supports TTL based expiry, making it suitable as a cache or a persistent key-value store. ⏰ By default everything is stored in memory, you can optionally also install a storage adapter. 🗄 Supported Storage Adapters ✅ : • Redis • Mongo • SQLite • Postgres • MySQL https://t.me/pgimg/80 [ Website ] : http://bit.do/keyv 〰〰〰〰〰〰 #JavaScript #KeyValue #Storage @ProgrammingTip

Polly 🕊 Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. ♻️ Installing via NuGet 🗃 :

Install-Package Polly

Usage :

public class Mailer
    {
        public static bool SendEmail()
        {
            Console.WriteLine("Sending Mail ...");

            // simulate error
            Random rnd = new Random();
            var rndNumber = rnd.Next(1, 10);
            if (rndNumber != 3)
                throw new SmtpFailedRecipientException();

            Console.WriteLine("Mail Sent successfully");
            return true;
        }
    }

We retry to send the email 3 times if something failed ❌ :

var policy = Policy.Handle<SmtpFailedRecipientException>().Retry(3);
policy.Execute(Mailer.SendEmail);

🔹🔸🔹🔸 https://t.me/pgimg/79 [ Github ] : http://bit.do/pollyc 〰〰〰〰〰〰 #CSharp #RetryPattern @ProgrammingTip

Fluent Validation ⚠️ A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules. 🚫 NuGet Packages :

Install-Package FluentValidation

For ASP.NET MVC integration :

Install-Package FluentValidation.MVC5

For ASP.NET Core :

Install-Package FluentValidation.AspNetCore

🔹🔸🔹🔸 Example :

public class PersonValidator : AbstractValidator<Person>
{
    public PersonValidator()
    {
        RuleFor(x => x.ID).NotEmpty();

        RuleFor(x => x.FirstName)
            .NotEmpty()
            .WithMessage("{PropertyName} is required !")
            .MinimumLength(5)
            .WithMessage("Minimum length for {PropertyName} is {MinLength} !");

        RuleFor(x => x.LastName)
            .NotEmpty()
            .WithMessage("{PropertyName} is required !")
            .MinimumLength(5)
            .WithMessage("Minimum length for {PropertyName} is {MinLength} !");

        RuleFor(x => x.Email)
            .NotEmpty()
            .WithMessage("{PropertyName} is required !")
            .EmailAddress()
            .WithMessage("{PropertyName} is not valid !");
    }
}

🔹🔸🔹🔸 https://t.me/pgimg/78 [ Github ] : http://bit.do/flval 〰〰〰〰〰〰 #CSharp #AspMvc #Validation @ProgrammingTip

Writing middleware for use in Express.js apps 🔥 Overview 🔎 Middleware functions are functions that have access to the request object (req), the response object (res), and the next function in the application’s request-response cycle. The next function is a function in the Express router which, when invoked, executes the middleware succeeding the current middleware. ⏭ Middleware can perform 💎 • Execute any code. • Make changes to the request and the response objects. • End the request-response cycle. • Call the next middleware in the stack. 🔸🔹🔸🔹 Configurable middleware 📥 If you need your middleware to be configurable, export a function which accepts an options object or other parameters, which, then returns the middleware implementation based on the input parameters.

in my-middleware.js

module.exports = function(options) {
  return function(req, res, next) {
    // Implement the middleware function 
    next();
  }
}

🔸🔹🔸🔹 Usage Middleware 📤 The middleware can now be used as shown below.

const mddleware = require('./my-middleware.js')
app.use(mddleware({ option1: '1', option2: '2' }))

https://t.me/pgimg/77 〰〰〰〰〰〰 #JavaScript #Express #Middleware @ProgrammingTip

Why I am in love with ES6❓ ES6 brings many new features to vanilla javascript making the language do more with less syntax. 🔥 New features like let and fat arrows let us manage scope very easily too. 🙇🏻 Some of ES6 new features 💎 : • Fat arrows • Rest/Spread Operators • Object Deconstruction • Default Parameters • import & export keywords https://t.me/pgimg/76 [ Article ] : http://bit.do/es6 〰〰〰〰〰〰 #JavaScript #ES6 @ProgrammingTip

Improving ASP.NET MVC Routing Configuration ✅ This post covers some ways you can improve the testability and reduce framework coupling when configuring routing in an ASP.NET MVC application. 🔥 https://t.me/pgimg/75 [ Article ] : http://bit.do/aspcr 〰〰〰〰〰〰 #AspMvc #Decoupling @ProgrammingTip

Angular 4 Custom Validation for Template Driven forms 🅰️ This article consists an example for a custom email validator using regex. 🌐 Angular 4 Already has a built-in validator for this “ng-pattern”. ⚠️ But this article is more focused on creating a base for custom validators so you could improve and use it for other use cases. 💎 Usage :

<input type="email" emailvalidator>

https://t.me/pgimg/74 [ Website ] : http://bit.do/anva 〰〰〰〰〰〰 #JavaScript #Angular #Forms @ProgrammingTip

The difference between ForEach, and For… In 💫 This is going to be a quick introduction to foreach, and for...in in JavaScript. ☝🏻 This article was written to introduce you to new methods that you can you can use instead of always using for loops.⚡️ https://t.me/pgimg/73 [ Article ] : http://bit.do/jsfor 〰〰〰〰〰〰 #JavaScript @ProgrammingTip

Semantic UI React ⚛️ Semantic UI React is the official React integration for Semantic UI .🙅🏻‍♂️ 🔸 jQuery Free 🔹 Declarative API 🔸 Augmentation 🔹 Shorthand Props 🔸 Sub Components 🔹 Auto Controlled State https://t.me/pgimg/72 [ Usage ] : https://react.semantic-ui.com/usage [ Website ] : https://react.semantic-ui.com 〰〰〰〰〰〰 #React #Semantic #FrontEnd @ProgrammingTip

All Kyle Simpson's (You Don't Know JS author) courses are free 💸 untill the next monday❗️ https://t.me/pgimg/71 [ Website ] : http://bit.do/ksim 〰〰〰〰〰〰 #JavaScript #ES6 #Tutorial @ProgrammingTip

What is Dynamic Proxy❓ A proxy, in its most general form, is a class functioning as an interface to something else. ↗️ The proxy could interface to anything : • A network connection 🌐 • A large object in memory 🗂 • A file 📄 • Some other resource that is expensive or impossible to duplicate. 💸 🔹🔸🔹🔸🔹🔸 One way of thinking about proxies, is by the analogy to The Matrix 🕶 by Krzysztof Koźmic 🤔 :

“People in the matrix aren’t the actual people ( “The spoon does not exist”, remember❓)

They’re proxies to the actual people that can be… wherever.🌍

They look like ones, they behave like ones, but at the same time, they are not them actually.🙅🏻‍♂️

Another implication is the fact that different rules apply to proxies.✳️

Proxies can be what the proxied objects are, but they can be more (flying, running away from bullets, that kind of stuff).✈️

One more important thing, is that proxies ultimately delegate the behavior to the actual objects behind them (kind of like – “if you’re killed in the matrix, you die in the real life as well”☠️).”

A dynamic proxy is a proxy that is generated on the fly at runtime. ✅ https://t.me/pgimg/70 〰〰〰〰〰〰 #Proxy #DynamicProxy @ProgrammingTip

Cool, the " Ranges " feature is planned for C# 7.3❗️ [ Github ] : http://bit.do/csran 〰〰〰〰〰〰 #CSharp @ProgrammingTip

File Ultimate 🔥 File manager control for integrating file browsing, upload & download features into your ASP.NET MVC & WebForms application or site rapidly. 💎 Supports ✨ : • ASP.NET Web Forms ( C# ) • ASP.NET Web Forms ( VB ) • ASP.NET MVC ( C# ) • ASP.NET MVC ( VB ) Features ⚡️ : • Browse and manage files with access control. • Accept files with the advanced upload functionality. • Offer a structured and neat download area. • Preview documents (70+ file formats, including PDF © Microsoft Office), images, audios and videos. 🔹🔸🔹🔸 https://t.me/pgimg/69 [ Github ] : http://bit.do/fgit [ Demo ] : http://bit.do/fmade 〰〰〰〰〰〰 #AspMvc #FileManager #Uploader @ProgrammingTip