At the Forge - jQuery
What makes jQuery so special and different? What does it offer? And, how can you integrate it into your applications? This month, I try to answer all of these questions, as we explore some of the basic features of jQuery. Next month, we'll look at some of the UI widgets that jQuery provides to spruce up our sites and make them more functional.
$('foo') // Prototype
to get the elements with id attributes of foo and bar. The number of parameters to Prototype's $() determines whether it returns a single value or an array, as well as how many elements that returned array contains.
Prototype also lets you retrieve items using CSS selectors (and a variety of pseudo-selectors), using the $$() function. For example:
$$('tr.even') // Prototype
returns an array (and always an array, even if it matches only a single object) of all of the tr tags with a class of even.
Well, jQuery works similarly, except that it has only a single function, $(). That function is smart enough to recognize what you want, based on a single CSS-style selector that you give it. (And yes, you may specify only a single selector.) However, id attributes need to begin with a # character, as is the case in CSS. Thus, you can say:
$('#foo') // jQuery
to get all the tags (and there should be only one such tag) that have an id attribute of foo, and:
$('tr.even') // jQuery
In modern computer systems, privacy and security are mandatory. However, connections from the outside over public networks automatically imply risks. One easily available solution to avoid eavesdroppers’ attempts is SSH. But, its wide adoption during the past 21 years has made it a target for attackers, so hardening your system properly is a must.
Additionally, in highly regulated markets, you must comply with specific operational requirements, proving that you conform to standards and even that you have included new mandatory authentication methods, such as two-factor authentication. In this ebook, I discuss SSH and how to configure and manage it to guarantee that your network is safe, your data is secure and that you comply with relevant regulations.Get the Guide
- Server Hardening
- EnterpriseDB's EDB Postgres Advanced Server and EDB Postgres Enterprise Manager
- The Death of RoboVM
- BitTorrent Inc.'s Sync
- The Humble Hacker?
- The US Government and Open-Source Software
- Open-Source Project Secretly Funded by CIA
- New Container Image Standard Promises More Portable Apps
- ACI Worldwide's UP Retail Payments
- Canonical and BQ's Aquaris M10 Ubuntu Edition Tablet