Five simple database design tips A flawed database can affect all areas of your application, so getting the design right is of paramount importance. Check out Builder's five simple design tips, and share some of your own. If an enterprise’s data is its lifeblood, then the database design can be the most important part of an application. Volumes have been written on this topic, and entire college degrees have been built around it. However, as has been said time and time again here on Builder.com, there’s no teacher like experience. I’ll get the show started by listing my five favorite tips and giving a brief explanation of the rationale behind each one. #1: Use meaningful field namesI once worked on a project I inherited from another programmer who liked to name fields using the name of the onscreen control that displayed the data from that field. Unless you are using a system that restricts you to short field names, make them as descriptive as possible—within reason, of course.
Javascript quiz I was recently reminded about Dmitry Baranovsky's Javascript test, when N. Zakas answered and explained it in a blog post. First time I saw those questions explained was by Richard Cornford in comp.lang.javascript, although not as thoroughly as by Nicholas. I decided to come up with my own little quiz. Host objects Contrary to Dmitry's test, quiz does not involve host objects (e.g. window), as their behavior is unspecified and can vary sporadically across implementations. So what are we testing? Not a lot really. Note, however, that not all questions are very practical, so don't worry if you can't answer some of them. Few notes about code Quiz Please make sure you select answer in each question, as lack of answer is not checked and counts as failure. I hope you liked it.
Node.js Apprenez à programmer en Java Bonjour à tous ! :D Bienvenue dans mon cours de programmation en Java. Voici les caractéristiques de Java en quelques mots : Java est un langage de programmation moderne développé par Sun Microsystems (aujourd'hui racheté par Oracle). On peut faire de nombreuses sortes de programmes avec Java : des applications, sous forme de fenêtre ou de console ;des applets, qui sont des programmes Java incorporés à des pages web ; des applications pour appareils mobiles, avec J2ME ;et bien d'autres ! Comme vous le voyez, Java permet de réaliser une très grande quantité d'applications différentes ! Heureusement, ce cours est là pour tout vous apprendre de Java à partir de zéro :) .
Ten Common Database Design Mistakes No list of mistakes is ever going to be exhaustive. People (myself included) do a lot of really stupid things, at times, in the name of “getting it done.” This list simply reflects the database design mistakes that are currently on my mind, or in some cases, constantly on my mind. Before I start with the list, let me be honest for a minute. So, the list: Poor design/planning Ignoring normalization Poor naming standards Lack of documentation One table to hold all domain values Using identity/guid columns as your only key Not using SQL facilities to protect data integrity Not using stored procedures to access data Trying to build generic objects Lack of testing Poor design/planning “If you don’t know where you are going, any road will take you there” – George Harrison Prophetic words for all parts of life and a description of the type of issues that plague many projects these days. Far too often, a proper planning phase is ignored in favor of just “getting it done”. Ignoring Normalization
Read Understanding ECMAScript 6 | Leanpub Introduction The JavaScript core language features are defined in a standard called ECMA-262. The language defined in this standard is called ECMAScript. What you know as JavaScript in browsers and Node.js is actually a superset of ECMAScript. Browsers and Node.js add more functionality through additional objects and methods, but the core of the language remains as defined in ECMAScript. The Road to ECMAScript 6 In 2007, JavaScript was at a crossroads. The scope of the ECMAScript 4 changes caused a rift to form in TC-39, with some members feeling that the fourth edition was trying to accomplish too much. ECMAScript 3.1 introduced very few syntax changes, instead focusing on property attributes, native JSON support, and adding methods to already-existing objects. In 2008, Brendan Eich, the creator of JavaScript, announced that TC-39 would focus its efforts on standardizing ECMAScript 3.1. ECMAScript 6 reached feature complete status in 2015 and was formally dubbed “ECMAScript 2015.”
Créez des applications pour Android Bonjour à tous et bienvenue dans le monde merveilleux du développement d'applications Android ! Android est un système d'exploitation mobile, c'est-à-dire que, tout comme Windows ou Linux c'est un gros programme, composé de petits programmes, qui permet d'exécuter d'autres logiciels. Par exemple, Windows permet d'exécuter Internet Explorer, et pour ce faire, il doit faire le lien entre la souris et le curseur à l'écran, entre le clavier et les champs de saisie, etc. Et avec l'explosion des ventes de smartphones ces dernières années, Android a pris une place importante dans la vie quotidienne de millions de personnes, au point qu'il s'agit du système d'exploitation mobile avec le plus d'applications en circulation. Que diriez-vous de développer vos propres applications pour Android, en les proposant au monde entier via le Play Store, le marché d'applications de Google ? Cependant, pour suivre ce cours, il vous faudra quelques connaissances :
Unity 3 – April 2013 patterns & practices Developer Center April 2013 Unity is a lightweight, extensible dependency injection container with support for instance and type interception. Overview Unity is a lightweight, extensible dependency injection container with support for constructor, property, and method call injection. Simplified object creation, especially for hierarchical object structures and dependencies. Unity is a general-purpose container for use in any type of Microsoft.NET Framework-based application. In addition, Unity is extensible. This release adds support for Windows Store apps as well as the registration by convention feature to ease the task of configuring Unity. Audience Requirements These reusable components and guidance are intended primarily for software developers and software architects. Contents of This Release Microsoft Unity 3 contains the following: Binaries. System Requirements Supported architectures: x86 and x64. For a rich development environment, the following are recommended:
Voyage au coeur de JavaScript (ECMAScript 3) Cet article est une traduction de JavaScript. The Core écrit par Dmitry Soshnikov. Javascript The Core est un sommaire détaillé de la série d’article “ECMA-262-3 in detail”. Commençons par étudier le concept d'objet, un fondamental d'ECMAScript. L'objet ECMAScript étant un langage orienté objet de haut niveau, il fonctionne avec des objets. Un objet est une collection de propriétés qui possède un unique objet prototype. Prenons pour exemple un objet simple. Cet objet possède deux propriétés explicitement déclarées et une propriété __proto__ implicite qui est une référence au prototype de foo: Mais pourquoi ces prototypes sont-ils requis ? Le chaînage des prototypes Les prototypes sont des objets comme les autres et peuvent posséder leurs propres prototypes. Une chaîne de prototype est une chaîne finie d'objet utilisé pour implémenter l'héritage et le partage de propriétés. Examinons le cas où nous avons deux objets qui diffèrent sensiblement. ECMAScript ne possède pas de concept de classe.
Simplifiez vos développements JavaScript avec jQuery Si vous avez déjà programmé en JavaScript, vous savez que ce langage est puissant, mais aussi « verbeux » et souvent assez complexe à mettre en œuvre. Si vous voulez accéder à toute la puissance de JavaScript en utilisant des instructions simples, logiques, faciles à comprendre et à maintenir, jQuery est vraiment fait pour vous ! Avec ce cours, je vous propose de découvrir les multiples facettes du framework jQuery. N'ayez crainte, votre apprentissage se fera en douceur et de très nombreux exemples de code documentés viendront consolider vos connaissances. Si vous lisez ces lignes, c'est parce que vous avez décidé d'aller plus loin dans vos développements Web.
Codecademy Labs AlexNogard : Tutos IT Linux : Supervision : Centreon, Nagios, Owncloud; Windows Server 2012 : Hyper-V 3 c# - Best Practices of fault toleration and reliability for scheduled tasks or services Read JavaScript Allongé | Leanpub A Pull of the Lever: Prefaces “Café Allongé, also called Espresso Lungo, is a drink midway between an Espresso and Americano in strength. There are two different ways to make it. The first, and the one I prefer, is to add a small amount of hot water to a double or quadruple Espresso Ristretto. Like adding a splash of water to whiskey, the small dilution releases more of the complex flavours in the mouth. Foreword by Michael Fogus As a life-long bibliophile and long-time follower of Reg’s online work, I was excited when he started writing books. The act of writing is an iterative process with (very often) tight revision loops. In the case of JavaScript Allongé, you’ll find the Leanpub model a shining example of effectiveness. As a staunch advocate of functional programming, much of what Reg has written rings true to me. Enjoy. – Fogus, fogus.me Foreword by Matthew Knox A different kind of language requires a different kind of book. –Matthew Knox, mattknox.com Why JavaScript Allongé? Instead of: