Project

dynarex

0.02
Low commit activity in last 3 years
No release in over a year
The Dynarex gem creates, reads, updates or delete rows of Dynarex flavoured XML records.
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
 Dependencies

Runtime

~> 0.2, >= 0.2.2
~> 0.1, >= 0.1.7
~> 0.6, >= 0.6.0
~> 0.8, >= 0.8.0
~> 0.2, >= 0.2.0
~> 0.7, >= 0.7.1
~> 0.8, >= 0.8.0
 Project Readme

Introducing the Dynarex gem

The Dynarex gem makes it convenient to read Dynarex records as a hash.

Installation

sudo gem install dynarex

Successfully installed dynarex-0.1.0
1 gem installed
Installing ri documentation for dynarex-0.1.0...
Updating class cache with 2747 classes...
Installing RDoc documentation for dynarex-0.1.0...

Example

require 'dynarex'

url = 'http://www.jamesrobertson.eu/dynarex/scotruby2010-all.xml'
users = Dynarex.new(url).records

# display the top 5 twitter users with the most followers
users.sort_by {|x| -x[:followers_count].to_i}[0..4].each_with_index do |user, i|
  puts "%d %+4s %s" % [i+1, user[:followers_count], user[:twitter_name]]
end

output:

1 8947 timbray
2 2510 jimweirich
3 2228 marick
4 1837 chacon
5 1619 objo

Here's the code for the Dynarex class

class Dynarex
  include REXML 

  def initialize(location)
    open(location)
  end

  def summary
    @summary
  end

  def records
    @records
  end

  private

  def open(location)
    if location[/^https?:\/\//] then
      buffer = Kernel.open(location, 'UserAgent' => 'Dynarex-Reader').read
    else
      buffer = File.open(location,'r').read
    end
    @doc = Document.new buffer
    @summary = summary_to_h
    @records = records_to_h
  end

  def display()
    puts @doc.to_s
  end

  def records_to_h
    XPath.match(@doc.root, 'records/*').map do |row|
      XPath.match(row, '*').inject({}) do |r,node|
        r[node.name.to_s.to_sym] = node.text.to_s
        r
      end
    end
  end

  def summary_to_h
    XPath.match(@doc.root, 'summary/*').inject({}) do |r,node|
      r[node.name.to_s.to_sym] = node.text.to_s
      r
    end
  end

end

Resources

update: 08-May-2010 @ 10:24pm

The latest Dynarex gem update means the above code runs as follows:

users.sort_by {|key,value| -value[:body][:followers_count].to_i}[0..4].each_with_index do |user, i|
  puts "%d %+4s %s" % ([i+1] + [:followers_count, :twitter_name].map {|x| user[1][:body][x]})
end

update: 09-May-2010 @ 9:59pm

The Dynarex gem now supports the method 'flat_record' to return a read-only snapshot of the dynarex records as a simple hash e.g.

users = Dynarex.new(url).flat_records

# display the top 5 twitter users with the most followers
users.sort_by {|x| -x[:followers_count].to_i}[0..4].each_with_index do |user, i|
  puts "%d %+4s %s" % [i+1, user[:followers_count], user[:twitter_name]]
end