RubyNotes - Tech - The Caboteria

Citrus is a fun parser generator for Ruby. It lets you mix small bits of Ruby code in with your parser grammar. http://mjijackson.com/citrus/

Invoking a method with an ampersand-parameter: http://blog.jayfields.com/2007/01/ruby-invoking-method-with.html

Github's style guide: https://github.com/styleguide/ruby


http://madebydna.com/all/code/2011/06/24/eigenclasses-demystified.html - metaprogramming basics<br>
https://www.youtube.com/watch?v=by5fFOBhtPQ - object model intro

---+ RVM

RVM is a nice tool that manages multiple installations of Ruby, JRuby, gems, etc. It's very useful if you're working on both Ruby and JRuby projects. http://rvm.beginrescueend.com/ <br/>
Since RVM compiles each version of ruby locally you need to make sure that you've installed the =-dev= packages for the features that you want.  Readline, for example: =libreadline-dev= on debian.  http://rubyforge.org/tracker/index.php?func=detail&aid=23925&group_id=1900&atid=7436

When you install RVM, run =rvm requirements= and install everything it recommends.  You'll probably also need =libpq-dev= (postgresql) and =libcurl-dev= (curl).

Debian - when I used RVM on Debian for the first time, I had to use RVM to install copies of zlib and openssl in RVM's tree.  For some reason =configure= couldn't see the Debian's versions.<br/>
http://rvm.beginrescueend.com/packages/openssl/<br/>
http://rvm.beginrescueend.com/packages/zlib/

---+ Debugging

http://bashdb.sourceforge.net/ruby-debug.html - ruby debugger user's guide <br/>
http://rubyforge.org/projects/ruby-debug/ - ruby debugger project page

You want to run =Debugger.start= as soon as you can (preferably at the top level) so the debugger can capture the full stack frame.

Tips on debugging memory leaks: http://blog.skylight.io/hunting-for-leaks-in-ruby/

---+ Rails Development

https://github.com/rails/rails/issues - this is the "official" Rails bug tracking system.  The Rails "trac" and "lighthouse" sites appear to be obsolete although they have powerful Google-fu

Run a single unit test:
<pre>
$ ruby -I"lib:test" test/test_filename.rb -n test_launch_should_create_a_response_set
</pre>
The "test_" prefix and underscores need to be added, so this invocation would match a method named "launch should create a response set".

---+ Performance

http://meta.discourse.org/t/tuning-ruby-and-rails-for-discourse/4126

---+ Security

http://blog.codeclimate.com/blog/2013/03/27/rails-insecure-defaults/ - 13 Security Gotchas You Should Know About