Category: Internet

How to Hide a DIV with jQuery

April 26, 2014 / Paul / 0 Comments

There are a lot of reasons why you might want to hide a portion of your web page: for example, there could be an image that you don’t want to show based on user type or an action may be available that lets the user hide a portion of the page. Hiding/showing can add dynamism to a page and jQuery makes it easy. If you look at some JavaScript examples of hiding a DIV you’ll notice that it takes quite a few lines of code to accomplish the task. New to JavaScript? Learn the Basics If you have any experience with jQuery, you’ll already know that it provides a much simpler way to accomplish the same goal. jQuery is a JavaScript library and …

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How to Hide a DIV with jQuery

Amazon uses Blu-ray Disc to Archive Data, Just Like Facebook

April 26, 2014 / Paul / 0 Comments

A few years back, Amazon introduced a somewhat bizarre sounding file backup service. Unlike an ordinary S3 bucket, Glacier was designed to protect data that you didn’t constantly need access to. As the name implies, it’s a sort of digital cold storage. It also moves slowly, like a Glacier would. If you need to retrieve some files, it can take three to five hours to “thaw” them. Ever since the service was announced, people (geeky ones, anyway) have been wondering what kind of hardware Amazon Glacier uses that lets them charge such ridiculously low rates. Storage is never cheap when you’re talking about petabytes of data, but if Amazon’s only charging 1 cent per gigabyte of geo-distributed secure storage they must be …

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Amazon uses Blu-ray disc to archive data, just like Facebook

Amazon’s Glacier secret: BDXL

April 25, 2014 / Paul / 0 Comments

Remember when Amazon Web Services (AWS) announced Glacier, a data archiving service, almost 2 years ago? Long-term, slow-retrieval (3-5 hours) storage for 1Â¢/GB while maintaining several copies across geographies. Pretty amazing. Less amazing now that disk prices are reaching 3Â¢/GB, but there’s still power, cooling, mounting and replacement costs to consider in addition to multiple copies. Tape? Amazon denied that. Plus the long-term storage requirements for tape require a level of climate control that their data centers may not support. Not tape. Hard drives to the rescue?That left disk. Perhaps Shingled Magnetic Recording (SMR) drives that, in theory, could double existing drive density at the cost of expensive rewrites. Which an archive wouldn’t have. Seagate announced they’d sold a …

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Amazonâ€™s Glacier secret: BDXL

Chrome DevTools Features You May Have Missed

April 25, 2014 / Paul / 0 Comments

In 2013, I posted a few tutorials on DevTools: Markup and Style, Networking and the Console and JavaScript and Performance, covering the basic features of the various DevTools panels. Since then, a lot has changed, so let’s take a look. Tl;dr DevTools has grown quite a bit since it was last covered on Tuts+, here are some of the features you’ll want to be aware of: Screencasting: view and interact with web pages on your Android device via DevTools on the desktop. Workspaces: use the Sources panel as a code editor. Edit code in your project and have that persist to disk. Source Map debugging: writing LESS/Sass or even CoffeeScript? Output Source Maps during compilation to have DevTools understand the mapping. *Flame Chart: *view an interactive …

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Chrome DevTools Features You May Have Missed

A traveler’s guide to in-flight WiFi

April 25, 2014 / Paul / 0 Comments

You’re on a nice, long domestic flight. In coach. There’s a screaming baby two rows up; the pages of the in-flight magazine are stuck together with someone else’s chewing gum; and the 9-inch overhead CRT is showing a 2-year-old episode of New Girl that you’ve already seen a half-dozen times — without sound, because you always end up in the seat with a broken headphone jack. Oh, and you have five hours left to go to LAX. If you play your cards right (and pack some noise-canceling headphones), your next cross-country haul could be a whole lot more pleasant, thanks to in-flight WiFi. Nearly all of the major US airlines now offer WiFi in the sky. Thousands of passengers flying above North…

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A traveler’s guide to in-flight WiFi