Concepteur & Développeur

About Apache Struts In the last 20 years on the market, the Apache Struts frameworks is still widely used by enterprises globally. Apache Struts is robust open-source framework for web applications. It follows the MVC (Model-View-Controller) model and extends the JSP API. Struts are easy to set up and provides much more flexibility and extensibility over the traditional MVC approach using servlets and JSP alone. It can be a good starting point for your career as a web developer. What is…

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Polymorphism means « many forms », and it occurs when we have many classes that are related to each other by inheritance. Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class. Polymorphism uses those methods to perform different tasks. This allows us to perform a single action in different ways. For example, think of a superclass called Animal that has a method called animalSound(). Subclasses of Animals could be Pigs, Cats, Dogs, Birds –…

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1. Introduction to Spring Framework Spring Framework is a Java platform that provides comprehensive infrastructure support for developing Java applications. Spring handles the infrastructure so you can focus on your application. Spring enables you to build applications from “plain old Java objects” (POJOs) and to apply enterprise services non-invasively to POJOs. This capability applies to the Java SE programming model and to full and partial Java EE. Examples of how you, as an application developer, can use the Spring platform advantage:…

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ECMA, What is it ? European Computer Manufacturers Association is the historic name given to the industry association dedicated to the standardization of information and communication systems. Currently this company is called Ecma International. And ECMAScript ? It’s a group of norms dedicated to type Script’s programming language and standardizing by Ecma International for ECMA-262 specification. This norms permits to manage different scripts like JavaScript or ActionScript.   What’s up in the web sphere? This company has approved the last version of ECMAScript…

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Debugging is one of those skills at the heart of a programmer’s business. Sometimes we try our best, but the program does not work properly, for example it crashes, it is just slow, or it prints out wrong information. What do you do when a program you’ve written doesn’t behave as expected ? You start to debug it. Determine where the error might be The first step is always to look at what is going on and try to determine…

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1.- Event The events are actions that occur when we interact with a web, for example, when we click on a button, write in an input text. They are the way html and javascript interact. When an event is triggered, the browser notifies the application that something has happened and that it needs to be handled. Events are controlled by javascript functions, so when that event occurs, the browser alerts our function that is listening that it should be executed….

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.forEach(), .map(), .filter() look realy similar but some point can change. forEach: is used to execute the same code on every element in an array but does not change the array and it returns undefined. .map(): executes the same code on every element in an array and returns a new array with the updated elements. .filter(): checks every element in an array to see if it meets a certain criteria and returns a new array with the elements that return…

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