Angular CLI 6 is here! With it, the Angular team has made it much easier to create libraries.
In this article, we show step by step how to create a simple library using Angular CLI 6. Let’s dive right in…
Getting Started with Xamarin.Forms and Azure Mobile App Service
Earlier this month my friend Ryan introduced us to Getting Started with Xamarin Forms and Prism. In that post, Ryan started a mobile application to display blog posts which he called SimpleBlog.
In this article, I would like to continue that demonstration by adding a back-end server to persist and share these blogs. This will be accomplished using Azure’s Mobile App Service which falls within its free tier services.
Yes, you did read that right: you can spin up an Azure account and have access to try out many of Azure’s features. For instance, the example I am going to walk you through today can be hosted indefinitely without costing you anything, and to that, you could add nine more web, mobile, or API services. See https://azure.microsoft.com/en-us/free/ for more information.
There is no way I am going to be able to cover all the possibilities available in an Azure Mobile App service, much less what Azure has to offer. My intent in this post is to help “whet your appetite” on the possibilities by giving a quick overview of just two great frameworks that play great together: the Microsoft.Azure.Mobile.Client mobile framework tied to an Azure Mobile Apps Service….
Reading and Writing from Excel in Spring Batch
We have discussed many different ways to read and write data in Spring Batch. The framework comes with quite an assortment of Readers and Writers that can be used directly or reused in some manner. Most of the time, the requirements consist of reading the data from some type of text file or database.
So what happens when the business we are supporting asks for something out of the ordinary, such as reading an Excel file and outputting the data to another Excel file? Typically the off-the-cuff response would be, “can you convert it to a CSV or other delimited text file?” Or “You know, Excel will read a CSV file just fine.” Sometimes that works, and sometimes the business requirements do not allow that type of flexibility.
Consider this scenario; in these days of Cloud and other online computing, the input file is likely created by a server that the company has no direct access to as far as programming. The file it creates is in one format, Excel. The output of your process has to go before several executives or other business clients and needs to be formatted in a professional looking manner. Adding a manual process to import a CSV and format it diminishes the value of using Spring Batch.
For the sake of the honor of the coding profession, you agree to the requirement to read and write from an Excel file directly. Now, how do you do that?…
Showcase of React + Redux Web Application Development
In the last few years, React has continuously gained popularity for the development of web applications. At Keyhole, we have several blogs talking about React and related technologies, including React, Formik, react-router, and many others.
So why would we need Redux? Quite often when we develop applications, we start with small pieces. As the business requirements change, new features/modules/components are added/removed/updated. Particularly in enterprise applications, you may end up with a deep hierarchy of parent-child relationships.
In a React application, parent component-states are passed down to its child component as property. Application states can be changed in many different places. If not managed perfectly (and, in many cases, it’s not), your system can behave differently than expected. It can become increasingly difficult for development, debugging, production support and code maintenance.
In this blog, I’ll talk about Redux and explain how it can benefit React front-end development. I’ll provide an introduction to using Redux with React and show a demonstration of reconstructing an example React application to React + Redux.
I’ll re-construct this React application into two projects. The first project will be the back-end server application which will handle all the typical business in the server end, like registration, authentication, database operation, etc. I’ll use MongoDB to persistent data and Node.js for REST API development. You can also reference RESTful API development to the Github repository open source khs-convo, released by Keyhole Software.
The second project will be pure front-end development, which will React with Redux for state management. React with Redux integration is the focus of this blog…
What’s New in JUnit 5.2
The JUnit team continues to make great progress in adding new features and enhancements to the JUnit 5 framework. We already have a second significant feature update after just seven months from the initial release of JUnit 5.
In this article, we look at some of the key features and enhancements added in JUnit 5.2 which was released on April 29th. We’ll focus on build tool enhancements that help in the adoption/migration to JUnit 5 for existing test suites and resolve annoyances, as well as what new changes further improve parameterized tests.