Yesterday I had to plug in my keyboard to the computer and wasn’t sure if it was working. How do I test? Well, I had to look up an older post, copy and paste some code to the console… what a drag. I though it would be cool to have a page where you can […]
mogrify (like convert) is one of the utilities that come with imagemagick. Here’s an example of how you convert a batch of pic files to jpeg. Same for png to jpeg, vice-versa, etc. $ mogrify -format jpg *.pic Boom! Next! Also see: batch convert audio/video files with ffmpeg
Here’s my new tool called intervals Play with it here. Learn about the theory behind it here. The code for the tool. What does it do? Generates a random music interval, shows it on the musical staff. You try to guess it. Clicking on the staff reveals the answer. You can also play the interval. […]
There’s a new tool in town. It lets you drag photos and gives you a map of where the photo was taken. Creepy, isn’t it? It figures this out using the meta (exif) information that’s part of a photo. The tool also lets you download a version of the photo without any exif information. The […]
One of the trouble areas with CSS (other than it’s too hard to master) is that it’s too easy to write a lot of it. (I’ll just leave it here. Lately we’ve seen far too much anti-CSS talk, I’m sure most of it is not wrong, but maybe not too productive either.) Therefore anything you […]
I use Dreamhost. Have been since 2008. If you’re not using Dreamhost… well, go sign up and here’s $50 off of the $97 yearly plan. Now some folks reminded me recently that the Perf calendar was not yet migrated to HTTPS… True enough. I have to do it. Eventually. In any normal situation I’ll procrastinate […]
I disabled comments on this blog and a few other some time ago because I couldn’t keep up deleting spam and it was getting embarrassing. I decided to clean the old ones up, add more protection (captcha? 1 + 5 = ?) and enable again. Needless to say, I failed because of procrastinating at step […]
Sometimes you browse your files in Finder and want to do some stuff on the command line with these same files. Opening Terminal and navigating to the same file location is lame. Finder-to-Terminal You can simply drag the icon of the file or folder in mind… …and drop it into a conveniently located nearby Terminal […]
(this industry and its lingo…) PWA – Progressive Web App, it’s… a long story, go read here React – library for building UIs. There’s a book on React by yours truly. create-react-app – a tool that generates skeleton React apps sw-precache – a tool that helps turn any web app into a PWA Before This […]
Every once in a while I feel inspired to create a little tool to “do one thing” ™. But often I get distracted and a little too lazy to get off the ground and forget all about it. So I thought maybe a little helper can, well, help move things along. Enter FAIL, short for […]
Using ImageMagick ($ brew install imagemagick) certainly helps. E.g. $ identify -verbose baseline.jpg | grep Interlace Interlace: None $ identify -verbose progressive.jpg | grep Interlace Interlace: JPEG As you can see baseline.jpg is baseline, i.e. not progressive, while progressive.jpg is indeed progressive. Newness Apparently in newer IM (v7.0.3.8+) you should be able to tell without […]
Ever needed a list of all the countries in the world to put as options in an HTML select? Well, here you go. And JSON too. You’re welcome! But how… How was the list derived so you can update it once in a while? Glad you asked. https://www.iso.org/obp/ui/#search/code/ is the page linked from W3 spec […]
In the spirit of Halloween… allow me to entertain you with some security and privacy nightmares with the way WebMIDI is implemented in Chrome currently. The spec says: “The suggested security model explicitly allows user agents to require the user’s approval before giving access to MIDI devices, although it is not currently required to prompt […]
TL;DR: Please start writing and finish before Dec 1st. Amazingly http://calendar.perfplanet.com has been up for 7 years straight now, helping spread the word about web performance and helping the developers do their best to provide fast and pleasurable experiences. Every year people from all walks of development life come to the calendar where an article […]
Inspired by this talk by Jean-Philippe Côté I saw at Web Unleashed in Toronto last month, I thought I should dust off the old midi cable. MIDI? MIDI is a protocol that various music and lighting devices use to talk to each other. Believe it or not v1.0 of the spec from 1983 is still […]
Auto-filling forms is cool. Unless, of course, you give away more data than you thought you were. The basics It’s pretty simple, actually. You just add an autocomplete attribute to your <input> and give it one of the predefined values. And off you go. For example: <input type=”text” autocomplete=”given-name”> When the browser sees this, it […]
I’m a little late (like, omgbbq, 2 months late) with this announcement, but here goes: I published my new book, called “React: Up and Running”. Go get it everywhere where books are sold and learn React from the ground up! I’ve been working with React for a while now and thought I have something to […]
Warning: don’t do this. Stop it! Just. Don’t. So there’s this hack by Ben Foxall that shows how you can escape the browser window and draw outside the page. I had to try it myself. So here comes: the animated “progress” indicator mouse cursor. Wait what? There exists the ability for your web page to […]
Another one of those… This time it’s set to the music of “Gremmie outta control” by The silly surfers, covered by Pearl Jam And this time I’ve added some chords for your entertainment… C….. C Every team has a clown who thinks he knows it all (personal commitment to excellence that good enough is not […]
Originally published at http://phpadvent.org/ in 2009. The site is no more, but I found a copy on my hard drive. I’m not sure but I do hope it’s the final version because Sean Coates (@coates) and Chris Shiflett (@shiflett) did a really nice job editing the pice. Also hope it’s still funny… With the unemployment […]
As announced, starting with React v0.14 (next release), the JSXTransformer.js won’t be part of the release. Also `react-tools` npm package is no more. So whatchagonnawannado is switch to Babel. Here’s how. Build-time transform Prerequisite: install Babel $ npm install –global babel Where you previously had this as part of your development/build process: $ jsx –watch […]
Looks like Yahoo! stopped maintaining the image optimization service called smush.it. So people have been asking questions on the mailing list. I don’t have any inside information from Yahoo about the service, or whether it will be back up again. But let me try to answer some of the questions. History: quick refresher Nicole and […]
So I spoke at Facebook’s F8 in San Francisco last week. Actually my teammate Varun spoke mostly, I just interrupted a few times. Among other things we announced a new plugin – the embedded video player, so now you can embed any public FB video on your site. And, how meta!, below is a video […]
Here’s a video I made to raise awareness about Anaconda Limousine’s first album (where I play guitar and co-wrote 1 song): https://www.youtube.com/watch?v=0LavyKbSuvI. This is a post that explains how it was made so if anyone wants to made a similar one, they can have something to step on. Turns out videos like this are called […]
Say, a bunch of .wav files to .mp3 $ for f in *.wav; do ffmpeg -i $f “${f%.*}.mp3”; done
These are links to some of the books I've writ
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