From the Trenches of the Enterprise Software

Yakov Fain

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Top Stories by Yakov Fain

In any component-based framework you’ll need to implement component communications. The main principle is that components should be loosely coupled hence reusable hence testable. The mediator design pattern allows you to arrange component communications via “the man in the middle” so a component A never communicates with the component B directly. If a component needs data, someone will provide the data via bindings to the component’s input properties. Who’s this someone?Ain’t no business of the component. If a component needs to provide some data to the external world, it’ll emit events (with the data payload). Emits to whom? Ain’t no business of the component. Let whoever needs the data listen to the events from this component. The mediator pattern is one of the ways to arrange a loosely coupled communication between components. In the following video I show an ex... (more)

Angular 2: Exposing a Child Component’s API | @CloudExpo #Cloud

In Angular 2 a parent component can pass the data to its child via binding to the child’s input parameter marked with the annotation @Input(). I’ll blog about it later, but you can see how it can be done in my blog on implementing the Mediator design pattern. In this blog I’ll show you another scenario when the parent component simply needs to use the API exposed by the child. You’ll see how a parent component can use the child’s API from both the template and the TypeScript code. Let’s create a simple application where a child component has the method greet() that will be invo... (more)

Starting an Angular 2 RC.1 Project | @CloudExpo #Angular2 #TypeScript #JavaScript

The current version of Angular is Release Candidate 1. This version changed the way how the framework is distributed – it comes as a set of scoped npm packages now. Any imports of the Angular classes will be done from @angular instead of angular2, for example: import {bootstrap} from '@angular/platform-browser-dynamic'; import {Component} from '@angular/core'; The content of package.json, index.html, and the configuration of the SystemJS loader has to be changed accordingly. This post is an extract of our book Angular 2 Development with Typescript, and it’ll show you how to get s... (more)

Angular 2 and TypeScript | @ThingsExpo @YFain #IoT #JavaScript #TypeScript

Why Java Developers Will Embrace Angular 2 and TypeScript Most of the Java developers I know don’t like JavaScript. Initially. They would give you different reasons why, but the real one is simple: too much to learn to make it work. For many Java developers creating the front end of a Web application in JavaScript is a chore to write and a burden to maintain. Nevertheless JavaScript rules in Web development and the new version of JavaScript (ES6) will make it even more popular. ES6 offers classes, standardized module definition, arrow expressions (lambdas), predictable “this” and... (more)

Oracle Starts Catering to the JavaScript Community with JET By @YFain | @CloudExpo #Cloud

During the last several years Oracle was working on their cloud solution, and several internal teams were creating JavaScript-based Web interfaces for the cloud. At some point Oracle decided to standardize on the set of JavaScript libraries used internally, and they also developed a set of reusable Web UI components both simple (e.g., buttons and forms) as well as complex (data grids, charts, accordion, and fancy gauges). All these components are based on jQuery UI and are responsive, so they can be used on mobile devices. Having a nice set of UI components is great, but is not en... (more)