35 results for: boolean
Infinite scrolling with native JavaScript using the Fetch API
I have long wanted to talk about how infinite scroll functionality can be implemented in a list of items that might be on any Web page. Infinite scroll is a technique that allows the user to interact with the mouse by scrolling down to load new dynamic content. In this way, the…
Category : Javascript 15-05-2023 by Janeth Kent
How to create PDF with JavaScript and jsPDF
Creating dynamic PDF files directly in the browser is possible thanks to the jsPDF JavaScript library. In the last part of this article we have prepared a practical tutorial where I show you how to implement the library. Below you can see the completed exercise. The client side is gaining ground over…
Category : Javascript 04-12-2022 by Janeth Kent
What is the difference between primitives types and objects in JavaScript?
In this short tutorial we are going to look at the differences between primitive types and objects in JavaScript. To start with, we're going to look at what primitive types are. Then we will see what objects are and how they differ. Introduction The primitive types in JavaScript are as follows: Boolean: 'boolean String:…
Category : Javascript 26-05-2023 by Silvia Mazzetta
Starting with Bootstrap-Vue step by step
Today we will show you how to use BootstrapVue, describe the installation process and show basic functionality. The project’s based on the world's most popular CSS framework - Bootstrap, for building responsive mobile-first landing page and combines it with Vue.js. Bootstrap-Vue does not yet support Vue 3. So if you want to…
Category : Javascript 13-04-2021 by
Validating HTML forms using BULMA and vanilla JavaScript
Today we are going to write about contact forms and how to validate them using JavaScript. The contact form seems to be one of the top features of every basic home page. It is a great way to encourage your visitors to make contact with you, by adding a form which…
Category : Javascript 31-12-2020 by
A FULFILLED PROMISE - Using the FETCH API to make AJAX calls
In this article we talked about what AJAX calls are and how to use them in a traditional way, by using the XMLHttpRequest (XHR) object. In short, thanks to AJAX calls a web page can be partially updated without having to reload the whole content. This leads to better loading…
Category : Javascript 26-12-2020 by Iveta Karailievova
How to make the website's dark mode persistent with Local Storage, CSS and JS
Recently we wrote about how to do a switchable alternative color mode or theme, a very useful and popular feature to websites. Today’s article is going to be about how to store a user’s settings on your website, specifically, how to save dark mode settings and restore it when a…
Category : Css 22-12-2020 by
A Java approach: While loop
Hello everyone and welcome back! After having made a short, but full-bodied, introduction about cycles, today we are finally going to see the first implementations that use what we have called preconditional cycle. In Java, as in many other programming languages, this type of cycle is translated with the term while, which…
Category : Java 25-10-2020 by Alessio Mungelli
A Java Approach: Selection Structures - Use Cases
Hello everyone and welcome back! Up to now we have been concerned to make as complete an overview as possible of the fundamental concepts we need to approach the use of conditional structures. We have therefore introduced the concept of conditional structures, outlining the various situations that could arise. We…
Category : Java 20-10-2020 by Alessio Mungelli
A Java approach: boolean variables
The previous time, we talked extensively about Boolean variables, trying to outline the main operations that can be carried out at a practical level. Of all the cases examined, we have not examined the most important and most recurrent one: the case in which the conditions to be examined are more…
Category : Java 18-10-2020 by Alessio Mungelli
A Java approach: conditional structures
Hello everyone and welcome back! The previous times we have introduced the concept of variable, trying to define some basic concepts about it. However, some situations suggest that the concept of variable alone is not enough to solve all the possible situations that may arise in front of us. A very…
Category : Java 03-04-2023 by Alessio Mungelli
A Java approach: variables
Hello everyone and welcome back! Today we will begin a journey that will lead us to study, and possibly review, what are the basics of programming. We will start by talking about variaibli. Introduction Anyone who wants to approach the world of programming will soon realise that coding is not exactly like what…
Category : Java 20-09-2020 by Alessio Mungelli
How to clone objects in JavaScript
Primitive and referenced values (objects) behave very differently when we want to make a copy of them. Primitive values Let's suppose a variable name that has a primitive value associated with it (number, string, boolean, undefined and null). If we make a copy of this variable name to another variable name2, any…
Category : Javascript 11-05-2021 by Luigi Nori
All the javascript functions and methods to manipulate arrays
This article will show that the prominent JavaScript array functions are .map(), .filter(), and .reduce(), and will then go through examples of instances in which .every() and .some() would save computing power over the more prominent solutions. You will learn helpful methods in JavaScript Array, an array is one of the…
Category : Javascript 10-08-2020 by Luigi Nori
Introduction to BEM (Block Element Modifier)
Problems with naming CSS classes I think I might not be the only one with this experience: after finally grasping all the important concepts regarding CSS I wanted to start giving what I thought would be beautiful yet simple style to my HTML code. But suddenly I ended up with class…
Category : Css 23-05-2020 by Iveta Karailievova
Java Design Pattern: Builder Pattern
Today we are going to talk about a creational pattern that in many situations can represent a useful alternative to the construction of the objects using the constructors: the Builder Pattern. The need to introduce alternative mechanisms to those provided by Java for the creation of objects is originated from the fact…
Category : Java 22-12-2019 by Alessio Mungelli
Java Sorting Algorithm: Bubble Sort
Programming, the need to order the collections of data or objects that must then be manipulated often arises. Ordering a list can be useful in cases where you have to do very quick searches. We will see later on how to maintain an ordered list is useful to carry out dichotomous…
Category : Java 15-12-2019 by Alessio Mungelli
Java Design Pattern: Factory Method Pattern
Going on with the speach about design patterns started previously, we are going to talk about another pattern often used: the Factory Method Pattern. The GoF (Gang of Four Design Patterns) defines it in this way: It defines an interface to create objects, but leaves to the subclasses the decision about the…
Category : Java 05-11-2019 by Alessio Mungelli
7 Useful tricks for writing more concise and performant JavaScript
When we started writing about JavaScript, we created a list of every time-saving trick we discovered in the code of other people, on websites, and anywhere other than the tutorials we used. Since then, we've been contributing to this list and now we are going to share 11 triks that strike us as particularly smart or helpful.…
Category : Javascript 04-06-2019 by Janeth Kent
Level Up Your JavaScript Skills: 12 basic notions
If you are a developer at any level, understanding its basic concepts is crucial. This article highlights 12 basic concepts that are critical to understanding by any JS developer, but do not represent the full range of what a JS developer should know. 1. Value vs. Reference Variable Assignment To coding bug-free JavaScript,…
Category : Javascript 23-05-2020 by Janeth Kent
ES2019 JavaScript and its new features
ECMAScript 2019 has finished and rolled out new exciting features for developers. The proposals which have been accepted and reached stage 4 by the TC39 committee would be included in the specification of that year and the others - are postponed to the next year. What that’s mentioned above is a…
Category : Javascript 18-02-2019 by Janeth Kent
Developing a JavaScript video game: Part 2
This article is the second part of a Javascript game tutorial. Here you can read the first part Let's create the spaceship Now that the background is finished, we can start setting up our space vehicle! Let's create a Player.js file and add it as a script to index.html. In essence, we want this…
Category : Javascript 06-03-2019 by Janeth Kent
Working with JSON in JavaScript
JSON is short for JavaScript Object Notation and an easy - to - access way to store information. In short, it gives us a collection of human - readable data that we can access in a very logical way. In addition to RSS feeds, any sites now share data using JSON,…
Category : Javascript 08-04-2020 by Janeth Kent
JavaScript Basis: Syntax & Structure
Programming languages are defined by rules. The syntax is what we follow when we write our code, which forms the logical structure of our programs. Let's dive right into the basic components of JavaScript. We will look at values, unicode, semi-colon, indentation, white spacing, commentary, case sensitivity, keywords..ect. By taking the time…
Category : Javascript 07-02-2019 by Janeth Kent
Vuejs and GDPR : how to be compliant with new EU regulations
Dear Vue's users, we know you're battling with GDPR compliance: but it can be quite simple if you use vue-analytics, on the grounds that there are two or three highlights here that can enable you to deal with the European Union's General Data Protection Regulation prerequisites. Suppose we have this situation…
Category : Javascript 21-09-2018 by Janeth Kent
How JSON data types work in mysql
First introduced in MySQL 5.7.8, the JSON data type is a specialized binary column type, similar to a blob , but with added machinery to optimize the storage and retrieval of values from a column typed as json . Javascript Object Notation or more commonly known as JSON, is a modern…
Category : Databases 30-09-2019 by
MySql: How to build a performant search engine
In content-heavy websites, it becomes increasingly important to provide capable search possibilities to help your users find exactly what they’re looking for. The most obvious solution is searching your MySQL database directly, but implementing a generic MySQL search is not at all trivial. Here’s how to avoid those pitfalls and…
Category : Databases 10-09-2016 by Janeth Kent
PHP7: Guide and References to all the changes between version 5.x and 7 of PHP
PHP 7 was released on December 3rd, 2015. It comes with a number of new features, changes, and backwards compatibility breakages that are outlined below. Performance Features Combined Comparison Operator Null Coalesce Operator Scalar Type Declarations Return Type Declarations Anonymous Classes Unicode Codepoint Escape Syntax Closure call() Method Filtered unserialize() IntlChar Class Expectations Group use Declarations Generator Return Expressions Generator Delegation Integer Division with intdiv() session_start() Options preg_replace_callback_array() Function CSPRNG Functions Support…
Category : Php 27-12-2015 by Janeth Kent
PHP Filters: the best way to sanitize and validate datas
What are PHP filters? One of the most amazing strengths of PHP is its convenience. Shockingly this same profit has worked against PHP as numerous new coders have forgotten any security to establish safety or fails to offer the adroitness to make a class to validate their variables from end users. One…
Category : Php 02-03-2020 by Janeth Kent
Mozilla introduces Firefox 29
Firefox 29 was released on April 29, 2014. The new version looks significantly more like Chrome than the old Firefox. It features the same three-bar menu on the right and rounded tabs, for example. At the same time, though, it keeps the separate search form — something most other browsers have…
Category : Software 29-04-2014 by Janeth Kent
How to Create Custom Filters in jQuery
If you are a web designer or a developer you frequently need a shortcut to collect elements for jQuery. In this post, based on the book Instant jQuery Selectors, you’ll learn how to build a custom filter in jQuery. So, we try to built a filter that ia able to print the length of…
Category : Javascript 17-12-2013 by Janeth Kent
Hash Passwords With PHP 5.5
Every PHP developer would have to build an application that relies on a user login. It means that the user of the website having a Username and Password which is stored in the database so they can login into your website. Therefore it's important that passwords stored in the database should be hashed…
Category : Php 28-08-2013 by Janeth Kent
21 PHP Libraries You Should Know About
The aim of the Standard PHP Library-or SPL is to provide a standard library of interfaces which allows developers to take full advantage of object-oriented programming in PHP. Therefore in this article we have collected 21 of the best PHP Libraries which will assist and help developers to simplify their work and serve…
Category : Programming 24-07-2013 by Janeth Kent
How to detect Mobile & Retina Devices: 8 Techniques
In order to serve mobile-optimized content, you need to detect which visitors are coming from mobile devices and which aren’t. Here we have list 8 method to detect mobile browsers so you can chose the best suitable to your needs, and give your user the best experience possible. #1 PHP User Agent We…
Category : Javascript 02-07-2013 by Janeth Kent
PHP-MongoDB Beginners Guide
Over the last year or so, there's been a small revolution taking place in the database world, with the advent of "schema-less" database systems like Apache CouchDB. These databases follow a different approach to data storage as compared to the traditional relational model, and they're quickly becoming popular with Web…
Category : Databases 11-04-2013 by Janeth Kent
