Fire up terminal, and give the following command to download and extract the Ruby 1.9.1 preview:

cd /tmp
curl http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-preview1.tar.gz | tar xz
cd ruby-1.9.1-preview1

Now we’ll build it. This will take a few minutes:

autoconf
./configure --prefix=/opt/ruby19
make

The –prefix=/opt/ruby19 will ensure that Ruby 1.9.1 preview is installed under /opt and doesn’t muck with the version of Ruby that comes with Mac OS (1.8.6 on Mac OS 10.5.5).

Finally, we issue the following command to install what we just built:

sudo make install

That’s it! You can run it from /opt/ruby19/bin/

/opt/ruby19/bin/ruby -v
ruby 1.9.1 (2008-10-28 revision 19983) [i386-darwin9.5.0]

On a related note, Jon has a wonderful suggestion about adding an alias to your ~/.profile which places /opt/ruby19/bin in your path before /usr/bin.

Surprisingly, the agenda varies considerably across countries and India will get only a subset of the sessions that are presented in North America (no game development or web development sessions for you India!). Considering how small Apple’s developer engagement footprint in India is, this is at least a start.

Head off to http://developer.apple.com/events/iphone/techtalks/ for session details and registration.

We don’t know the exact venues yet. We plan to be attend at least one of the two events in India and will keep you posted.