By Kyle Simpson
ISBN-10: 1491924411
ISBN-13: 9781491924419
It’s effortless to profit elements of JavaScript, yet a lot tougher to profit it completely—or even sufficiently—whether you’re new to the language or have used it for years. With the "You Don’t understand JS" booklet sequence, you’ll get a extra whole figuring out of JavaScript, together with trickier elements of the language that many skilled JavaScript programmers easily avoid.
The series’ first publication, Up & Going, offers the required heritage for these of you with restricted programming adventure. by way of studying the elemental construction blocks of programming, in addition to JavaScript’s middle mechanisms, you’ll be ready to dive into the opposite, extra in-depth books within the series—and be good in your means towards precise JavaScript.
With this ebook you will:
-Learn the fundamental programming construction blocks, together with operators, kinds, variables, conditionals, loops, and functions
-Become accustomed to JavaScript's center mechanisms reminiscent of values, functionality closures, this, and prototypes
-Get an summary of alternative books within the series—and research why it’s very important to appreciate all elements of JavaScript
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Extra info for You Don't Know JS: Up & Going
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For example, if you know for a fact that you will only be using SQL server as your data store, then there is no need to add support for other database systems or to write database-agnostic code because you ain’t gonna need it. Everything should be made as simple as possible, but no simpler. ” The DRY principle is aimed at reducing duplication. Duplication decreases maintainability because it increases the difficulty of change. It might also lead to inconsistencies and ambiguity. During refactoring is a good time to look at code that you have been copying and pasting in multiple places and refactor it into a single and authoritative location.
Our code might look like this: [Log()] public void AddFriend(string friendName) { try { //code that adds a friend } catch (Exception ex) { //handle exception } } 12 Chapter 1: Requirements The Log aspect (attribute) will be able to log the appropriate messages at different points during the method invocation, for example on entry, on exit, on error, and so on. Def nitions Aspect — A modularization of a cross-cutting concern — for example, logging, transaction management, tracing, exception handling, or authorization Joinpoint — A point where the main program and the aspect meet during execution — for example, a method invocation or an exception being thrown Advice — The action taken by the AOP framework at a joinpoint Patterns I want to briefly explain some design patterns that we will most likely use in this application.
AddClass(“red”); }); The preceding code will add the class "red" to any "h2" element. JQuery also has a huge community, good documentation, and a great repository of plug-ins and extensions. With that said, I also really like YUI (Yahoo! User Interface Library); it has an excellent set of user interface controls/widgets. It is very well documented, has good support, and looks great. There are two components that I will use from YUI: the Rich Text Editor and the YUI Test Utility. The YUI Test Utility comes with a good test runner (shown in Figure 1-9) and has excellent documentation.
You Don't Know JS: Up & Going by Kyle Simpson
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