Installing Ruby 1.9.2 via rvm on OS X

It took me a bit of digging to figure this out (it kept failing with readline errors, and then iconv went missing), so I thought I'd share:

rvm package install readline
rvm package install iconv
rvm install 1.9.2 -C --enable-shared,--with-iconv-dir=$HOME/.rvm/usr,\
--with-readline-dir=$HOME/.rvm/usr,--build=x86_64-apple-darwin10

OS X Screen Sharing over SSH

I recently set up a Mac Mini at home, and have found using Screen Sharing to access it invaluable. Not wanting to open up anything other than SSH on my home router, I created the following script to open up a Screen Sharing session over SSH:

Peter Callesen - A Single Sheet of Paper

Peter Callesen - A Single Sheet of Paper

Optimism

Optimism

Life is Beautiful

Life is Beautiful

“Oh Mary” by theresa andersson (via zefrank.com)

“Oh Mary” by theresa andersson (via zefrank.com)

Richard Feynman and The Connection Machine

Richard Feynman and The Connection Machine:

I heart Feynman

via this isn’t happiness

via this isn’t happiness

Christoph Niemann’s Abstract City

Christoph Niemann’s Abstract City

Video

Opera 10 Anchor Tag Rendering Bug

For some time now, Wesabe's transaction edit dialog has been broken in Opera (10.10 as of this writing). Since it was fine in all other major browsers, and none of us were Opera users, fixing it was never high priority. I thought I'd take a look at it again tonight, though, and just when I was about to give up and go to bed, I managed to track it down.

If you have an anchor (<a>) tag that contains block-level elements (which is technically not allowed, but all other browsers seem to be ok with it), such as <p> or <div>, the anchor will close itself before the elements it is supposed to contain. E.g.:

<a>
<p>hello</p>
</a>

Will render as:

<a> </a>
<p>hello</p>


If you give the anchor an href, though, even if it is just a blank string (<a href="">...), it renders fine.

Here's a page that demonstrates the bug: http://footle.org/misc/opera-bug.html.

Anyway, I filed a bug with the Opera folks. Time for bed.

Muhammad Ali Tribute (GP)

Muhammad Ali Tribute (GP)

Better Dictionary: Wordnik

Ok, thanks to Google for putting their dictionary out there, which I wrote about a couple of posts ago, but the quality of the results pales in comparison to Wordnik, which I've just discovered. It won't do language translation for you, but as far as the English language is concerned, this is pure word porn. So here's an updated bookmarklet for you:

wordnik

Just drag that to your bookmarks bar, select a word or phrase on the page, and click. Happy bonus: just clicking on the bookmarklet without highlighting a word first will give you a random word (thanks to Wordnik, not me). Cool!

Chrome Frame's Shifty User-Agent

One of the security measures we have in place at Wesabe is to invalidate a session and log the user out if their User-Agent or IP address subnet changes between requests. However, we recently had a number of complaints that users were getting logged out prematurely. Looking at one user's session in the logs, I noticed that their user agent string had "chromeframe/4.0" appended for some requests, but not others. It turns out that Google's Chrome Frame only modifies the user agent for top-level requests, and not for subsequent requests sent as that page loads:

It was a compromise to keep code complexity down. In order to tag every request from IE...we have to have hooks in place at many more places (not to mention supporting the different things IE6, 7 and 8 do). So, as a compromise we decided to keep it down to only the single hook that allows us to tag top level requests.

This fix on our side was to just strip the chromeframe identifier from the user agent string, although it makes me wonder what other browser extensions cause similar issues and whether invalidating a session when the user agent changes is even a worthwhile security measure.

Google Dictionary Bookmarklet

Google recently launched a decent dictionary, so for you logophiles, here's a bookmarklet that will bring up the definition of whatever text you have selected on the page: gDefine. Just drag it to your bookmarks toolbar, then double-click a word somewhere and click the button to get a definition.

It is set to use the English dictionary, but if you want to use it in a different language (or even translate between languages), just change the langpair parameter from en|en to, say, fr|fr for French, de|de for German, etc. (try a search on the Google Dictionary site in the language you want and look to see what the langpair parameter is in the url). Also, the hl parameter controls the language of the results page, so if you want your results to be in that language as well (as opposed to English), change that accordingly.

Here are a few to get you started:

gDefine (French)
gDefine (Spanish)
gDefine (German)

And translations:

gTranslate (French>English)
gTranslate (English>French)

Enjoy!

Bill Cosby on Drums

Bill Cosby on Drums

Wanted: 7 Fearless Engineers! (via Rich Coad)

Wanted: 7 Fearless Engineers! (via Rich Coad)

cyoa

cyoa:

Impressive analysis of Choose Your Own Adventure books, a fixture of my childhood.

Cell Size and Scale

Cell Size and Scale

We Could Use More of This

There’s a weekly Tuesday evening Ultimate Frisbee game at a field near my house (sadly, I haven’t gotten out to play in ages). Now that it’s getting dark early, they need the lights on in order to play. The city is usually pretty stingy with the lights, but this just came through on the mailing list:

So here’s the deal with the lights for the lower field….The lady (I forget her name) wants us to help out with getting supplies for their cooking class: taco stuff, corn dogs and fries (maybe potatoes), chicken and rice, stuff like that to teach cooking with. The reason is, the state is cutting back on funding and she asks us for donations of food to help out with the class. In turn she said we could have the field and lights as long as we turn off the lights when we’re done and if the soccer teams try to take over she will deal with them for us. Not a bad deal, plus we’re able to help the families and do a barter.

So: Bring food and play Tuesday night!

I love it.