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def with_host(host)
  previous_host = Rack::Test::DEFAULT_HOST.dup
  Rack::Test::DEFAULT_HOST.replace host
  yield
ensure
  Rack::Test::DEFAULT_HOST.replace previous_host
end

# Usage:

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class Report
  def update_tipifications(tipifications)
    self.tipifications = tipifications
    analizar!
    save!
  end
end

class ReportsController
  def save

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require "uri/generic"

module URI
  class Redis < Generic
    DEFAULT_PORT = 6379

    COMPONENT = [:scheme, :password, :host, :port, :db].freeze

    def db
      path[1..-1].to_i

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Regarding databases in Redis
============================

The question on named databases and requests for more database-aware
features is a recurrent issue in the Redis community. Salvatore has
explained why using databases is in most cases a bad idea, and thus
expressed that he won't add more features to it.

> I understand how this can be useful, but unfortunately I consider
> Redis multiple database errors my worst decision in Redis design at

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require "active_record"

module HasManyPreventDestroy
  def has_many(association, options = {}, &extension)
    before_destroy { send(association).empty? } if options.delete(:prevent_destroy)
    super(association, options, &extension)
  end
end

class Foo < ActiveRecord::Base

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# Removing old Rubies in preparation for RVM

/usr/bin/gem list | awk '{ print $1 }' | xargs /usr/bin/gem uninstall -a --install-dir=/Library/Ruby/Gems/1.8 --bindir=/usr/bin
/usr/bin/gem list | awk '{ print $1 }' | xargs /usr/bin/gem uninstall -a --install-dir /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8 --bindir=/usr/bin

/opt/local/bin/gem list | awk '{ print $1 }' | xargs /opt/local/bin/gem uninstall -a

for file in $(find /usr/bin -type f); do (head -n1 $file | grep '^#.*ruby' > /dev/null) && echo $file && rm $file; done

port installed | ack '^(j?ruby|rb\-)' | awk '{ print $1, $2 }' | xargs port uninstall

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require "json"

module JQuery
  class Selector < BasicObject
    def initialize(string)
      @value = "jQuery(#{string.to_json})"
    end

    def method_missing(name, *args)
      arguments = args.to_json.sub(/^\[/, "").sub(/\]$/, "")

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class Array
  def ===(other)
    return false if size != other.size

    ours, theirs = each, other.each

    loop { return false unless ours.next === theirs.next }

    true
  end

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require "redis"

Redis.current.flushall

def tokenize(string)
  (0..(string.size - 3)).map do |i|
    string[i, 3]
  end
end

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// Allows to get browser-specific properties like column-count.

var cssPrefix = null;

if ($.browser.mozilla) cssPrefix = "moz";
  else if ($.browser.webkit) cssPrefix = "webkit";
  else if ($.browser.opera) cssPrefix = "o";

$.cssHooks["columnCount"] = {
  get: function(element, computed) {