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Easy to use ruby library for interacting with Confluence - confluence4r · 31 July 2009, 16:43

http://confluence.atlassian.com/display/CONFEXT/Confluence4r

I added a gemspec for the package to the bottom of the page if you want to build it as a gem in-house.

— Max Schubert

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Getting ruby 1.8.7 and newer to compile with readline support on Red Hat Enterprise Linux (RHEL4 and RHEL5) · 4 April 2009, 10:20

Paraphrased from http://www.sanft.com/2008/12/01/upgrading-to-ruby-186-on-red-hat/

First, ensure you have the following packages installed:

Then make sure you remove the system ruby and ruby-devel packages, otherwise gems and other extensions might find the wrong version of ruby when they look for compile flags etc:

After unpacking the source for ruby, do the usual:

configure --prefix /usr/local
make all
sudo make install

Now do the following from the ruby source directory:

cd ext/readline
/usr/local/bin/ruby extconf.rb
make
make install

To ensure that ruby now has readline support, run

/usr/local/bin/ruby -rreadline -e 1

If you get no output (which should be the result), voila, readline support is now active.

— Max Schubert

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Getting ruby gem mysql native extension to install on RHEL5 / CentOS 5 · 2 April 2009, 12:04

From

http://www.wzzrd.com/2008_02_01_archive.html

If you are on a 32-bit platform:

gem install mysql -- --with-mysql-conf=/usr/bin/mysql_config --with-mysql-lib=/usr/lib/mysql

If you are on a 64-bit platform:

gem install mysql -- --with-mysql-conf=/usr/bin/mysql_config --with-mysql-lib=/usr/lib64/mysql

— Max Schubert

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Which rubies do not work with rubygems 1.3.x? · 2 April 2009, 11:28

Anything later than ruby 1.8.7. Spent a few hours learning that lesson:

Thanks to my coworker, Ryan Richins, for pointing me to a version that does work!

— Max Schubert

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Freezing Ruby Data Structures Recursively · 15 September 2008, 14:18

Flavorrific published a monkey patch that extends Object with a deep freeze method that freezes child arrays and hashes of a data structure so that they aren’t accidentally changed (for example, configuration data from YAML).

I have extended his work in the following ways: 



class Object


 # Define a deep_freeze method in Object (based on code posted by flavorrific
 # http://flavoriffic.blogspot.com/2008/08/freezing-deep-ruby-data-structures.html)
 # that will call freeze on the top-level object instance the method is 
 # called on in as well as any child object instances contained in the
 # parent. This patch will also raise an IndexError if keys from    
 # ‘deeply frozen’ Hashes or Arrays are accessed that do not exist.

	
def deep_freeze


  #  String doesn’t support each
  if (self.class != String) && (self.respond_to? :each)
    each { |v|
      v.deep_freeze if v.respond_to?(:deep_freeze)
    }
  end

  #  Deep freeze instance variable values
  if self.kind_of? Object
    self.instance_variables.each { |v|
      iv = self.instance_variable_get(v)
      iv.deep_freeze
      self.instance_variable_set(v, iv)
    }
  end

  if self.kind_of? Hash
    instance_eval(<<EOF)
      def default(key)
        raise IndexError, “Frozen hash: key ‘\#{key}’ does not exist!”
      end
EOF
  end

  #  Prevent user from accessing array elements that do not exist.  
  if self.kind_of? Array
    instance_eval(<<EOF)

      def at(index)
          self.fetch(index)
      end

      def [](arg1, arg2 = nil)

        results = Array.new

        if ! arg2.nil?
          #  Start index and end index given
          arg1.upto(arg1 + arg2) { |index|
            results << self.fetch(index)
          }
        else
          if arg1.kind_of? Range
            #  Range passed in
            arg1.each { |index|
              results << self.fetch(index)
            }
          else
            results << self.fetch(arg1)
          end

        end

        results

      end
EOF

    end

    #  Freeze the current structure
    freeze

  end

	
end

— Max Schubert

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