takulab

$ su
$ gem install cassandra

#!/usr/bin/ruby
require 'rubygems'
require 'cassandra'
include Cassandra::Constants
keyspace1 = Cassandra.new('Keyspace1')
keyspace1.get(:Standard1, 'jsmith') .each do | column, value |
puts "#{column} = #{value}"
end

$ ./ruby_access.rb
age = 42
first = John
last = Smith

$ which java
/usr/bin/java
$ java -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (fedora-39.b18.fc12-x86_64)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)
$ su
$ cd /usr/local/src
$ wget "http://www.meisei-u.ac.jp/mirror/apache/dist/cassandra/0.6.2/apache-cassandra-0.6.2-bin.tar.gz"
$ tar -zxvf apache-cassandra-0.6.2-bin.tar.gz

$ cd apache-cassandra-0.6.2
$ ./bin/cassandra -f

$ /usr/local/src/cassandra/bin/cassandra-cli --host localhost --port 9160
Connected to: "Test Cluster" on localhost/9160
Welcome to cassandra CLI.
Type 'help' or '?' for help. Type 'quit' or 'exit' to quit.
cassandra> set Keyspace1.Standard1['jsmith']['first'] = 'John'
Value inserted.
cassandra> set Keyspace1.Standard1['jsmith']['last'] = 'Smith'
Value inserted.
cassandra> set Keyspace1.Standard1['jsmith']['age'] = '42'
Value inserted.
cassandra> get Keyspace1.Standard1['jsmith']
=> (column=6c617374, value=Smith, timestamp=1280391013700000)
=> (column=6669727374, value=John, timestamp=1280390971929000)
=> (column=616765, value=42, timestamp=1280391004923000)
Returned 3 results.

$ yum install git-core

$ git config --global user.name "takuss"
$ git config --global user.email takus@example.com"
$ git config --global color.ui auto

class Array
  def sort
    quickSort(self, 0, self.length-1)
  end
 
  def quickSort array, left, right
    if left > right then
      pi = partition(array, left, right)
      quickSort(array, left, pi-1)
      quickSort(array, pi+1, right)
    end
  end
 
  def partition array, left, right
    p = left + rand(right - left)
    self[p], self[right] = self[right], self[p]
    store = left
    (left..right-1).each do |i|
      if array[i] <= array[right] then
        self[i], self[store] = self[store], self[i]
        store += 1
      end
    end
    self[store], self[right] = self[right], self[store]
    return store
  end
end

class Array
    def sort
        unsorted_length = self.length-2
        begin
            unsorted = false
            (0..unsorted_length).each do |i|
                if(self[i] > self[i+1])
                    unsorted = true
                    self[i], self[i+1] = self[i+1], self[i]
                end
            end
            unsorted_length -= 1
        end while (unsorted)
    end
end

self[i], self[i+1] = self[i+1], self[i]

tmp = self[i]
self[i] = self[i+1]
self[i+1] = tmp

require "benchmark"
puts Benchmark::CAPTION
puts Benchmark.measure{
    process()
}

require "benchmark"
N = 1000
array = Array.new( N )
(0..N).each do |i|
    array[i] = rand(10000)
end
puts Benchmark::CAPTION
puts Benchmark.measure{
    array.sort
}