Programming & AI Tips 💡

JavaScript — Null vs. Undefined ⚡️ Learn the differences and similarities between null and undefined in JavaScript. ⁉️ At first glance, null and undefined may seem the same, but they are far from it. ↔️ This article will explore the differences and similarities between null and undefined in JavaScript. ✅ https://t.me/pgimg/97 [ Article ] : http://bit.do/nullu 〰〰〰〰〰〰 #JavaScript #Null @ProgrammingTip

5 More C# Extension Methods for the Stocking ➕ A Bonus Method For Enums ! 💥 1️⃣ ToInt() ➖ We always have the familiar .ToString(), but what happens when we want to convert a simple string to an integer❓ 🔹🔸🔹 2️⃣ OrdinalSuffix() ➖ This extension method places a 'th', 'st', 'nd', 'rd', or 'th' to the end of the number. 🔚 🔸🔹🔸 3️⃣ Occurrence() ➖ This just counts the number of occurrences in a string. 🔍 🔹🔸🔹 4️⃣ Join<T>()/Join() ➖ With this extension method, you can take an array or List<string>() and make a comma-delimited list in no time or build a broken-up URL with dashes as the URL name. ✅ 🔸🔹🔸 5️⃣ ToQueryString() ➖ Have you ever wanted to take a NameValueCollection and convert it into a query string for a URL ? 🌐 🔹🔸🔹 ⚡️ Enums.ToList<T>() - Bonus Method ➖ This Enums.ToList<T> static method is meant to take enumerations with description attributes and convert them into a NameValueCollection for possibly a dropdown. 📜 🔸🔹🔸 https://t.me/pgimg/96 [ Article ] : http://bit.do/chex 〰〰〰〰〰〰 #CSharp #ExtensionMethod @ProgrammingTip

Architecting Services with Design Patterns 💎 As the number of your services expands you're going to need to start thinking about how to organize them. 🗂 Applying these two design patterns can help, provided you understand all their variations. ✅ With the current set of tools that come with the Microsoft .NET Framework, it's easy to create a service. ⚙️ But it's also easy to create what both Nayaki Nayyar and Benjamin Moreland described as a "junk drawer of services." 👾 If you're going to avoid that as the number of services in your organization increases, then you need to think about your architecture. 🤔 https://t.me/pgimg/95 [ Article ] : http://bit.do/asdp 〰〰〰〰〰〰 #CleanCode #DesignPatterns @ProgrammingTip

Google it 😂🤦‍♂️ 〰〰〰〰〰〰 #Fun @ProgrammingTip

Auth0: Introduction and Initial ASP.NET MVC Project Setup 🚀 The big selling points for Auth0, and other services like it, are that it removes you from having to worry about Auth/User Management and get to the part of your applications that bring value to your customers. 👥 As with Identity Server, Auth0 can use OpenID Connect (as well as a lot of other protocols), single sign-on and API Access Control. ✅ https://t.me/pgimg/94 [ Article ] : http://bit.do/auas 〰〰〰〰〰〰 #AspMvc #Auth0 #Authentication @ProgrammingTip

ASP.NET MVC Best Practices and Guidelines ✅ While most developers were used to WebForms and Microsoft's stock controls, when developers moved to ASP.NET MVC, a number of developers were shocked because there wasn't enough meat for this to be a full-featured release. 🤓 Some of the guidelines list below are based on my own experiences over the years since 2008. 📆 https://t.me/pgimg/93 [ Website ] : http://bit.do/aspbst 〰〰〰〰〰〰 #AspMvc #CleanCode #BestPractices @ProgrammingTip

Working With Zip Files In ASP.NET MVC 🗂 Since ASP.NET 4.5, zipping and unzipping files can be done with classes from within the .NET framework. 📂 Despite that, nearly all examples that illustrate working with zip files in ASP.NET applications feature third party open source compression libraries. 👾 This short article attempts to correct that by demonstrating the use of the System.IO.Compression classes in an ASP.NET MVC application to ✅ : 1️⃣ Unpack an uploaded zip file 2️⃣ Create one for download https://t.me/pgimg/92 [ Article ] : http://bit.do/aspzip 〰〰〰〰〰〰 #AspMvc #Compression @ProgrammingTip

How we do MVC – View models 👀 The ViewModel is a central aspect of our MVC architecture. 🌞 One of the first dilemmas facing MVC developers is to decide what the “M” in MVC means in ASP.NET MVC. 🤔 In Rails, this is fairly clear, the M is ActiveRecord (by default). 🌍 But in ASP.NET MVC, the “M” is silent❗️ Its out-of-the-box architecture offers no guidelines nor advice on what the M should be. ⚙️ Should it be an entity❓ Data access object❔ DTO❓ Something else❔ https://t.me/pgimg/91 [ Website ] : http://bit.do/mvvm 〰〰〰〰〰〰 #AspMvc #CleanCode #BestPractices @ProgrammingTip

The state of JavaScript in 2017 🔥 A few years back, a JavaScript survey would've been a simple matter. Question 1 : Are you using jQuery❓ Question 2 : Any comments❓Boom, done❗️ But as we all know, things have changed. ✨ The JavaScript ecosystem is richer than ever, and even the most experienced developer can start to hesitate when considering the multitude of options available at every stage. There's data from over 20,000 developers, asking them questions on topics ranging from front-end frameworks and state management, to build tools and testing libraries. ✅ https://t.me/pgimg/90 [ Website ] : https://stateofjs.com 〰〰〰〰〰〰 #JavaScript #Analytics @ProgrammingTip

Automatic ModelState Validation in ASP.NET MVC 🔥 How many times have you seen or written code like this ♻️ :

[HttpPost]
public ActionResult Index(SomeModel model)
{
    if (ModelState.IsValid)
    {
        return View();
    }   

    // do something
    return RedirectToAction("index");
}

Stop repeating ModelState checks in your ASP.NET MVC controller actions. ❌ Wouldn’t it be nice if all we had to do was like this ? ⚡️

[HttpPost]
[ValidateModelState]
public ActionResult Index(SomeModel model)
{
    // if we get here, ModelState is valid
    // save to db etc.
    return RedirectToAction("index");
}

https://t.me/pgimg/89 [ Article ] : http://bit.do/msta 〰〰〰〰〰〰 #AspMvc #CleanCode @ProgrammingTip

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