• Slide about my first public presentation in London

    Yesterday I’ve done a presentation about front-end development with javascript and I’ve introduced the Ember JS framework.

    It was an amazing evening, I really enjoyed it! Thank you Geek Girls Carrot UK for organizing this event.

    Geek Girls Carrots is an organisation that promotes women in IT industry and tries to encourage more females to think about career in tech.

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    daniela-remogna-slide-front-end-development-javascript

    Download Slide

    Pictures

    daniela-remogna-introducing-ember-js daniela-remogna-javascript-speaker
  • Join my presentation about Ember JS

    Hello :-)

    I’m gonna be a speaker for the event Geek Girls Carrots London reactivation with Ember JS and Business Development! organised by Geek Girls Carrots London.

    daniela-remogna-speaker-about-ember-javascript

    You can register via Event Brite here.

    This is the meetup and Facebook page.

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  • Business Intelligence: decision making with a decision tree

    Are you looking for a needle in a haystack?

    Data mining allows to explore and analyze a wide quantity of data stored in a database with the goal to extract precious and unknown informations which are implied on data and they might be useful for making strategic decisions.

    Data mining techniques are used to discover correlations between data (assosacition rules), to create classifier for predicting a variable’s value (decision tree, neural networks) or to organize unknown data in groups with similar features (clustering).
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  • How to create a single page app with AngularJS thanks to the help of Yeoman

    Yeoman (http://yeoman.io/) is an awesome tool that helps you to easily scaffolding a web application using best practice; in short words with yeoman you get rid doing manual configuration and set up of a project from the scratch.

    Yeoman has a bunch of generators, for instance there is a generator for creating an angularJS app, an other one for creating a backbone app and so on. You can find a complete list of the generators on this link: http://yeoman.io/generators/official.html

    In this small tutorial we are going to use the yeoman angular generator for generating all the boilerplate that a developer needs to get started with an angular app. You can find more informations about the angular generator at the following link: https://github.com/yeoman/generator-angular.
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  • Classification with neural networks

    Neural networks are used on the field of data mining in order to perform classification and regression.

    Neural networks are ispired to the human brain that works via associations using neurons.
    The neurons are individual processing unit, linked each other via synapses.
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  • An introduction to AngularJS

    If you wanna talk about AngularJS you’ve to explain the concept of: Directive, Controller, Expressions, Two way Data Biding and Modules.

    AngularJS is a javascript framework maintaned by Google who helps developer to build awesome Single Page App. It is born especially to build web app after a user has logged in, so for all the apps that doesn’t need to be indexed by search engines likes CRM, ERP, Social Network and so on. You can compare angular as a new HTML compiler which allows you to create your own domain specific language in HTML, by attaching your own behavior to any HTML element, attribute or text. In AngularJS the term “compile the HTML” means attaching event listeners to the HTML to make it interactive. It follows a declarative approach in order to infer behaviour on your html page.

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  • Test Driven Development with Javascript

    Why should I write Test before Source Code?

    Writing Tests is not only a technique to validate your code. Tests give you the specifications of how the code should behave. Writing tests before source code implies that you must know exactly the detailed behavior of your code, as observed from outside the code itself. This is the basic idea of Test Driven Development.

    Wikipedia gives us this definition:

    Test driven development is a software development process that relies on the repetition of a very short development cycle: first the developer writes an (initial failing) automated test case that defines a desired improvement or new function, then produces the minimum amount of code to pass that test, and finally refactors the new code to acceptable standards.

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  • An introduction to Backbone

    Thanks to the large diffusions of mobile devices such as tablet and smartphone, nowadays when a developer has to create a web application, the first requirement he has to satisfy is designing a web applications that can be delivered via a desktop browser or a mobile device (iPhone App, Android App and so on).
    The first question a developer has to answer is: how to organize the code between server and client side?

    If the client side is rendered completly from server side code, the developer has to write different code for each device. So it could be complicated. A better approach is writing the server side code in a manner that it just returns a jSON response with all data of the application; then the client side javascript library will read and process this jSON response in order to create the required DOM elements. With this approach, the developer can use same server code for any device and when the developer make changes on the client side, the server side code does not need to change.

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  • I’m a PHP Developer, why I should use Javascript & Node.js to write my server-side code.

    If you are a PHP Developer maybe you are used to write your server-side code in PHP and then you make run your code on a web server like Apache. Javascript, from your point of view, it’s simply a client-side scripting language and you use it to handle the front-end client business logic on a web page. A front-end developer might argue that with javascript is possible to manipulate the DOM via a library such as JQuery. You can do more than this. With one language you could code client-side and server side of a web application. Your brain context-switching will say “Thank you”. This is actually a benefit, for both developers and other company’s stakeholders (Search on google “the cost of context-switching for developers”).

    So, it may sound strange to hear “Write your server-side code in Javascript using Node.js techonology“.

    Anyway, you are here because you don’t understand why you should use Node.js to develop web applications.

    Take a rest, drink a coffee and continue to read this article.
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  • Asynchronous Javascript with Promises

    Promises are an alternative way to the callback system for javascript asyncronous event. Instead of calling a callback, we call a function that returns immediatly a promise. Thus we can exit very soon from the function and continue with our code as in synchronouse code style.

    Promises are a way to avoid the Callback hell and they are typicaly used for Ajax Requests (jQuery returns promises by default from Ajax requests) and UI animations. With promises you can easily synchronize tasks or execute tasks sequentially.

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