![]() ![]() There are a number of useful ECMAScript 5 features which are supported by V8, such as Array.forEach(), Array.indexOf(), Object.keys() and im(). This chapter focuses on Arrays, Objects and Functions. Accepting variable number of arguments in functions.Iterating through the properties (keys) of an object.Checking whether the contents of an Array satisfy a criteria.As the name implies, it was originally developed for JavaScript, but can be used in any language and is very popular in web applications.In this chapter, I go through a number of useful ECMA5 functions for situations such as: ![]() JSON is a human-readable format for storing and transmitting data. In this article, we’ll cover the basics of what JSON looks like and how to use it in your web applications, as well as talk about serialized JSON-JST and JWT-and the competing data formats. Understanding what JSON is and how it works is a foundational skill for any web developer. While the format was first developed in the early 2000s, the first standards were published in 2006. If you’ve consumed an API in the last five to ten years, you’ve probably seen JSON data. ![]() That’s where JSON (JavaScript Object Notation) comes in. XML gained early popularity, as it looked like HTML, the foundation of the web. From early on, the format that this data was transferred in mattered, and like the web, the best formats were open standards that anyone could use and contribute to. As the web grows in popularity and power, so does the amount of data stored and transferred between systems, many of which know nothing about each other. ![]()
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