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Scaling your Redux App with ducks – freeCodeCamp When you learn about redux and the roles of actions and reducers, you start with very simple examples. Most tutorials available today don’t go to the next level. But if you’re building something with Redux that’s more complicated than a todo list, you’ll need a smarter way of scaling your codebase over time. Someone once said that naming things is one of the hardest jobs in computer science. Let’s explore how we approached code organization in the past. Function vs Feature There are two established approaches of structuring applications: function-first and feature-first. One the left below you can see a function-first folder structure. Function-first means that your top-level directories are named after the purpose of the files inside. This doesn’t scale at all. The problem is also about coupling the folders together. One advantage of this approach is that it isolates — in our case — React from redux. This approach scales much better, because each new feature comes with a new folder. Types
DevFreeCasts Atom Basics Atom Basics Now that Atom is installed on your system, let's fire it up, configure it and get acquainted with the editor. When you launch Atom for the first time, you should get a screen that looks like this: This is the Atom welcome screen and gives you a pretty good starting point for how to get started with the editor. Terminology You can find definitions for all of the various terms that we use throughout the manual in our Glossary. Command Palette In that welcome screen, we are introduced to probably the most important command in Atom, the Command Palette. Throughout the book, we will use shortcut keybindings like Cmd+Shift+PCtrl+Shift+P to demonstrate how to run a command. If you want to see a different platform than the one we detected, you may choose a different one by using the platform selector near the top of the page: If the Platform Selector is not present, then the current page doesn't have any platform-specific content. Settings and Preferences To open the Settings View, you can:
Le Jardin de JavaScript Bien que JavaScript utilise une syntaxe avec accolades pour les blocs, il ne crée pas de portée "scope" de bloc; par conséquent, la seule portée du langage est la portée de fonction. function test() { // une portée "scope" for(var i = 0; i < 10; i++) { // pas une portée // count } console.log(i); // 10} Il n'existe pas d'espaces de noms "namespaces" en JavaScript, ce qui signifie que tout est défini dans un espace de noms commun partagé par tous. Chaque fois qu'une variable est référencée, JavaScript va traverser vers le haut toutes les portées jusqu'à ce qu'il la trouve. Le fléau des variables globales // script Afoo = '42'; // script Bvar foo = '42' Les deux scripts ci-dessus n'ont pas le même effet. Ne pas utiliser var peut avoir des répercussions majeures. // portée globalevar foo = 42;function test() { // portée locale foo = 21;}test();foo; // 21 En laissant de côté la déclaration var à l'intérieur de la fonction test, on remplace la valeur de foo. Variables locales Remontée "hoisting"
React in Action - PDF eBook Free Download Book Name: React in ActionAuthor: Mark Tielens ThomasISBN-10: 1617293857Year: 2018Pages: 360Language: EnglishFile size: 14.5 MBFile format: PDF React is a highly-performant tool that implements a one-way data flow model. Reasoning about an interface or application written with React ends up being much easier because it decreases overall complexity for developers working with it. React in Action introduces front-end developers to the React framework and related tools. Key Features: Clearly writtenExample-richHands-on