Holy Chao

If you're trying to install REE with RVM, and you just, for example plug in the following

rvm install ree-2011.03

It doesn't work terrifically under OS X

It also serves as a local minima of functionality, in that it will get caught with the failure condition even if you remember to add something like:

rvm install ree-2011.03 -C --with-readline-dir=/usr/local

after having done the wrong thing.

You need to do the following:

rvm cleanup all
rvm install ree-2011.03 -C --with-readline-dir=/usr/local

At Relevance, one of our favorite tools to use is Devise. It has become the de facto standard for authorization when we need a solution, and with good reason. It solves a specific problems and plays nicely with others.

However, it can totally ruin your test suite's performance.

I've recently had the opportunity to work with some really exciting JavaScript tools that make developing apps that run in the browser much more powerful and managable than I've been accustomed to working with in the past. The trio of tools I am specifically interested in is CoffeeScript, Underscore.js and Backbone.js. I am specifically targeting technical audiences for this work, I will be assuming a good deal of comfort working with JavaScript, the DOM, and jQuery already. Additionally I will assume you understand Rails well enough to build a trivial app in it.

Rivaling the amazing transitive powers of Nightcrawler, Jon Distad and I decided to tackle the problem of parsing CSV rapidly under Ruby 1.9. "Aha!" you might be saying, "FasterCSV was already rolled into the stdlib in Ruby 1.9! Why would I need a gem to handle it?" Well you have a very good point there, FasterCSV was a good response to the performance of the old 1.8 stdlib CSV parser. However there are still cases where it doesn't quite go fast enough.

I've been playing with the last few days of my 20% time at Relevance working with Michael Feathers' ideas about Code Turbulence, specifically with a mind for being able to examine it through time.

I recently was presented with the opportunity to purchase a Kymera Magic Wand Remote. "I get to play wizard while controlling my television?" I thought, "SIGN ME RIGHT UP!"

It's a very neat toy and considering the technology problem it is trying to solve, very well done. (I find there's some crosstalk between "flick down" and "tap top").

However it's a learning universal remote, and the problem with these is that if you use it with Windows via a Windows Media Center receiver device, the operating system will "Debounce" all inputs. Essentially you will end up able to do any input once, but not multiple times in a row without some other input intervening.

This is a stupid, compatibility breaking feature. Fortunately you can disable it. Point REGEDIT to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\HidIr\Remotes\745a17a0-74d3-11d0-b6fe-00a0c90f57da. Find the EnableDebounce key, and change it's value from 1 to 0. Poof! You've just done a little more magic to make Windows compatible with something Microsoft didn't build.

I've been running into some complications trying to get ruby 1.9.2 installed by RVM on OS X 10.6.3. This is likely not an original problem, but I got it to work. My environment is pretty crufty, I have an oldish Macbook Pro that came installed with 10.4, and has had an upgrade path including 10.5. Macports, and it's ruby interpreter were on my system, as well as the default Mac ruby, and a ruby source tarball installation.

I had since uninstalled all rubies except for the 1.9.2 source tarball, and uninstalled Macports in favor of migrating to Homebrew.

My specific problem is working on a project in which the .rvmrc specified ruby-1.9.2-p0, and rvm install ruby-1.9.2-p0 did not act as expected. I received the error

readline.c:1292: error: 'username_completion_function' undeclared (first use in this function)

Starting with brew and rvm installed I then needed to do some more:

Install readline:

brew install readline

Cleanup to only one version of readline:

brew cleanup readline

Link the brew install to /usr/local:

brew link readline

Install with rvm passing args to autoconf:

rvm install 1.9.2-p0 -C --enable-shared,--with-readline-dir=/usr/local

No compile errors, and proper readline support! Yay. My thanks to George at Plataforma Tecnologia for this solution.