An Angular PWA From Front-End to Backend: Send/Receive Messages

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This is the third part of the series about the AngularPwaMessenger project. It is a chat system with offline capability. The second part showed how the login process for online and offline works.

This part will be about how to send and receive messages. A message can be sent while offline. It is then stored in the indexed DB and sent when the device is online again.

Access Redshift Data With Entity Framework 6

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Entity Framework is an object-relational mapping framework that can be used to work with data as objects. While you can run the ADO.NET Entity Data Model wizard in Visual Studio to handle generating the Entity Model, this approach, the model-first approach, can put you at a disadvantage if there are changes in your data source or if you want more control over how the entities operate. In this article you will complete the code-first approach to accessing Redshift data using the CData ADO.NET Provider.

  • Open Visual Studio and create a new Windows Form Application. This article uses a C# project with .NET 4.5.
  • Run the command ‘Install-Package EntityFramework’ in the Package Manger Console in Visual Studio to install the latest release of Entity Framework.
  • Modify the App.config file in the project to add a reference to the Redshift Entity Framework 6 assembly and the connection string.To connect to Redshift, set the following:

    Deploying an Angular App on a Google VM Using Bitbucket Pipelines

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    Angular is one of the most widely used JavaScript frameworks. But though the builds are easy, developers face issues when configuring deployments and setting up CI/CD pipelines. This post outlines the steps required to deploy an Angular application to a Google VM using Bitbucket Pipelines.

    What Are Pipelines?

    Bitbucket Pipelines allow developers to configure continuous delivery (in the cloud) of source files to test/production servers. These pipelines are configured to connect to the production server using YAML scripts.

    View Component or Tag Helper?

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    Suppose you are working on an ASP.NET Core web application. To avoid havingn the views and layouts grow massively, you plan to separate some parts of these to independent components. This way you don’t repeat code you wrote once. You find view components and tag helpers, but which one should you use?

    The Difference Between View Components and Tag Helpers

    It’s important to understand what is what before doing any work.

    Default Implementations Coming to Interfaces With C# 8

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    C# 8.0 will introduce new language feature — default implementations of interface members. This means that we can define a body-to-interface member and implementing class that doesn’t implement the given interface member and will use the default one from interface itself. Here’s my deep-dive and analysis of default implementions of interfaces.

    Default Implementations of Interface Members

    Let’s start with a classic example based on Mads Torgersen’s blog post, Default implementations in interfaces, and take a look at this famous logger example. Let there be an interface for a logger.

    iOS Developer Guide

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    2If you are thinking of learning iOS app development, i.e. developing games and application for Apple’s iOS devices like the iPhone and iPad, and looking for some free courses then you have come to the right place. In this article, I am going to share five free courses to learn iOS app development. It also allows you to create apps for MacOS and Linux as well.

    By the way, Apple’s iOS is an amazing platform, it not only allows you to create apps and games but also provides a platform to publish and sell your work. You can upload your apps or games into the App Store and earn some money by selling it or just opting to show ads on your games.

    C# Developer’s Guide to React.js (Part 3): Conditionally Rendering HTML in React

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    This is the third in a series of posts on interesting things I’ve discovered about React; the first two parts can be found here:

    1. C# Developer’s Guide to React.js (Part 1): Create and Run
    2. C# Developer’s guide to React.js (Part 2): Moving Controls

    One of the things that tripped me up early on while I was learning React (not that I’m a fully-fledged expert now or anything) was how to display HTML elements based on a given criteria. For example, say you only want to display a label while the form is loading, or you want to display a message based on other information on the screen.

    The Clojure Programming World: Libraries and Other Tools

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    With the vibrant community, the Clojure language has a good core of libraries, collections, and other ready-to-use tools. According to a 2019 survey, 25% of Clojure users create or maintain open source solutions. Some programmers also check and fix issues (17%), or report on them (15%).

    Clojure users
    Closure Users per SurveyMonkey

    Although all these libs aim to simplify Clojure programming tasks, they may confuse a beginner. Sometimes, it’s difficult to understand how to put all of them together and find an optimal solution for a specific task. So, now I want to show you my favorite tools for programming in Clojure. We will talk about:

    Angular Timer (Auto Refresh Component)

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    I had been working on a project where I need to refresh a page after a specific interval. For that, I had written a component that triggers an output event after a specified amount of time using @Input(). This is a higly customized component, as it is not doing anything active; rather, it owns the functionality and delegates the rest of the funcationality to the parent component that hosts this child component through @Input() and event emitters.

    Coming straight to the code, I had used a time from RxJS to execute a code block after every second.

    How to Connect Your React Application With Redux

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    An exciting adventure for React developers is when they connect their React application with redux and when you have made it this far in reading about React, that means you are on the way to explore the out of the box concept of how you can manage global states in your application. This article will be helpful for React developers in integrating React applications with Redux.

    Though React gives us the ability to manage state for our components, the dependency of the parent components on the child components and state management between two components becomes complicated with the increasing size of the application. To resolve this issue we have a third-party library called Redux which gives us all these wonderful features we need for global state management. Read Further at React Application with Redux.

    Web Design Tips to Avoid Traffic Loss When Your Website Is Facing Downtime

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    Downtime can happen to any online merchant at any time. Whether it is intentional, accidental, or spontaneous, the question is, are you prepared to take the plunge when it happens?

    A bad downtime means your website will not serve the incoming customer. This not only makes the website unavailable to the visitors, but also halts your store’s ability to generate conversions. Consequently, the visitor gets bad user experience and your page’s bounce rates begin to increase. While putting the website in downtime should be the last resort, some cases make it necessary for the website to become inaccessible, such as server maintenance. However, when you are experiencing downtime on your website, there are a few ways you can turn it around and actually benefit from it.

    Docker on a Linux-Based EC2: Containerizing a C# .NET API Service

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    Dockerized ASP.NET Core APi

    This blog post describes the steps for packaging a C# .NET Core API service into a Docker image; focusing on how to run a container using the various options that Docker offers, especially interacting with external resources.

    I won’t dwell on Docker technology and its benefits, there are some great blog posts for that, here is one of them. I’ll start from the very beginning: a plain Linux-based EC2 instance.

    Top React Libraries for Developers to Check Out in 2019

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    Whether you are a single developer or a project manager, the first and the foremost thing you want is to keep up with the latest trends in the market and have a clear idea about the newest core technologies. Now, this does not come as a surprise as a core characteristic of a developer is to keep up with changing technologies. If we look at the things from the perspective of an entrepreneur, things are not much different. They want to opt for the best technology solution for their business to progress and grow.

    So, from every perspective, if you are thinking about JavaScript, then it has to be React. React is an open source JavaScript library which is used to build amazing interfaces for mobile and web applications. This JavaScript library comes with standalone code in bits, which are called components, and it has the ability to combine with other JavaScript frameworks and libraries out there easily. Now, these components have managed to take up the limelight.

    Tag Helper Syntax for View Components

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    Calling view components in ASP.NET Core views may lead to long and ugly code lines containing generic type parameter of view component and anonymous type for InvokeAsync()method parameters. Something my readers have been interested in for a long time is the tag helper syntax for view components.

    ASP.NET Core Pager Example

    Suppose you have pager implemented as view component and there’s support for multiple views.

    Build a Basic Ticket Sales App With ASP.NET Core, Angular, and Stripe

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    Internet shopping is about more than just Amazon. It’s become a daily activity for most Americans, and e-commerce is a required feature for many projects a developer may encounter. In this tutorial, you’ll learn how to build an e-commerce site to sell tickets using an Angular 6 single page app (SPA) and an ASP.NET Core 2.1 backend API. You’ll build both the Angular and ASP.NET Core applications and run them from within VS Code. Let’s get to it!

    Upgrade to Angular 6

    I love to use the latest and greatest when starting a new project. But when you use a project generator (like Angular-CLI, or the DotNetCLI), you may be at the mercy of the latest version the authors of those libraries have added. Right now, the DotNet CLI generates an Angular application with dotnet new angular gives you an Angular app at about version 4.5, which is about two versions behind the latest. Let me show you how to upgrade the templates and the generated application so that you’re using Angular 6, which is the latest as of the time of this article.

    How to Use Node.js for Your Website and Application

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    Node.js is built on Chrome’s V8 JavaScript engine and one of the popular open-source JavaScript runtime environments, which can be used to create a website, upload files, and create a TCP App on ECS. In this article, you will get some useful information on these.

    How to Build a TCP Application With Node.js on ECS

    Before you start the process, you will need a machine running a Linux/Unix distribution such as Ubuntu or macOS, a code editor/IDE with Node.js installed on it, and a basic working knowledge of Node.js.

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