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Mois : décembre 2021

Encapsulation in Java

Encapsulation in Java

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One of the most important features of object-oriented programming is encapsulation. This feature allows us to isolate the data of our objects from the access of other external objects, and thus restrict direct access to the attributes or methods that we do not want to allow, since the state of an object is generally hidden. To define visibility in Java, reserved words are available : Public Allows access from any class to any method or attribute defined with this modifier….

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ECMAScript, focus on 2021’s features

ECMAScript, focus on 2021’s features

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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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Learn how to debug JavaScript using the DevTools browser debugger

Learn how to debug JavaScript using the DevTools browser debugger

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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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Pace.js, automatic page load progress bars

Pace.js, automatic page load progress bars

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Pace.js is a lightweight (~4kb minified and gzipped) and standalone JavaScript library to create beautiful progress indicators for your page load and ajax request. It automatically monitors AJAX requests, event loop lag, document ready state, and elements on your page to decide the progress. On ajax navigation it will begin again. Pace.js currently comes with 15 themes and 10 color variables, you can customize all these themes. Minimal Flash Barber Shop Mac OSX Fill Left Flat Top Big Counter Corner…

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AddEventListener – Javascript

AddEventListener – Javascript

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An event listener is a procedure in JavaScript that waits for an event to occur. The simple example of an event is a user clicking the mouse or pressing a key on the keyboard. The addEventListener() is an inbuilt JavaScript function which takes the event to listen for, and a second argument to be called whenever the described event gets done. Any number of event handlers can be added to a single element without overwriting existing event handlers. Doing different…

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Event Delegation in JavaScript

Event Delegation in JavaScript

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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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difference between : .forEach(), .map(), .filter().

difference between : .forEach(), .map(), .filter().

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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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Three.js

Three.js

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Three.js Requirement : Basics knowledge on JavaScript. Tips: To begin a strong and fast project you can use vite.js but it needs vue.js. By this way you can import easily and have a render without recharging the page. To resume, Vite is a local server for developers. Vite.js: https://vitejs.dev/ First of all, what are the basics of Three.js ? Based on : Java script. What that : It’s a langage on object. What for ? To build a scene. How ? There are three important’s…

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Velocity.js

Velocity.js

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If we go by the definition of technological watch, writing about velocity would not be the first subject that would come to mind. As matter of fact, it has been around for a while but little do we know about this library. Therefore, allow me to reintroduce you to Velocity.js. So, what is Velocity.js? Velocity is a free, lightweight library that lets us easily add animations to our sites, ranging from the simplest of animations to the most complex. Velocity…

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The state of the art JavaScript Frameworks

The state of the art JavaScript Frameworks

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Over the years, JavaScript is commonly used in the development of professional web pages, both on front-end and back-end. Also, it is a very powerful scripting language, widely used for controlling web page behavior. As per the survey by Github for top languages over the year, Javascript is leading the race consecutively 8th year in a row. A software framework is an abstraction in which software providing generic functionality can be selectively changed by additional user-written code. JavaScript framework is an…

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