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

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#Proxy #DynamicProxy
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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

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#JavaScript #ES6 #Tutorial
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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

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#React #Semantic #FrontEnd
@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

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#JavaScript
@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

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#JavaScript #Angular #Forms
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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

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#AspMvc #Decoupling
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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

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#JavaScript #ES6
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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

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#JavaScript #Express #Middleware
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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

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#CSharp #AspMvc #Validation
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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

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#CSharp #RetryPattern
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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

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#JavaScript #KeyValue #Storage
@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

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#JavaScript #ForEach #Map
@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

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#SQLServer #Profiler #DbForge
@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

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#JavaScript #NodeJs #Authentication
@ProgrammingTip

Writing CV 😂
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#Fun #NoSQL
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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

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#Xamarin #ReactNative #Ionic
@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

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#AspMvc #CleanCode
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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

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#AspMvc #AspCore #ETag
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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

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#AspMvc #CleanCode
@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

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#JavaScript #Analytics
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