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      <page pageid="33" ns="0" title="Reverse Engineering">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">==[[iOS app decrypt | iOS app decrypt]]==
==[[iOS debugserver with IDA | iOS debugserver with IDA]] ==
==[[theos on MAC OS | theos on Mac OS]] ==
==[[ARM disassembly]]==
==[[tcpdump and wireshark]]==</rev>
        </revisions>
      </page>
      <page pageid="13" ns="0" title="Ruby on Rails">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">==Tutorials==
Beginner's tutorial&lt;br&gt;
http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step-by-step-tutorial/&lt;br&gt;
Ruby in 20 minutes&lt;br&gt;
http://www.ruby-lang.org/en/documentation/quickstart/&lt;br&gt;

==nil?, empty? and blank?==
&lt;pre class=&quot;brush:ruby&quot;&gt;
.nil? can be used on any object and is true if the object is nil.

.empty? can be used on strings, arrays and hashes and returns true if:

String length == 0
Array length == 0
Hash length == 0

Running .empty? on something that is nil will throw a NoMethodError.

.blank? will operate on any object
nil.blank? == true
false.blank? == true
[].blank? == true
{}.blank? == true
&quot;&quot;.blank? == true
5.blank? == false
&quot;  &quot;.blank? == true
&quot;  &quot;.empty? == false
&lt;/pre&gt;
&lt;h3&gt;How to skip active record in rails 3&lt;/h3&gt;
1. Create new rails project with 
&lt;pre class=&quot;brush:ruby&quot;&gt;
rails new myApp --skip-activerecord
&lt;/pre&gt;
2.

In application.rb, remove the require 'rails/all' line and instead add these lines:
&lt;pre class=&quot;brush:ruby&quot;&gt;
require &quot;action_controller/railtie&quot;
require &quot;action_mailer/railtie&quot;
require &quot;active_resource/railtie&quot;
require &quot;rails/test_unit/railtie&quot;
require &quot;sprockets/railtie&quot;
&lt;/pre&gt;
Also see Remove ActiveRecord in Rails 3 and look into the Active Model railscast

Rails 3.2.x:

You'll also need to remove/comment out this line in application.rb
&lt;pre class=&quot;brush:ruby&quot;&gt;
config.active_record.whitelist_attributes = true
&lt;/pre&gt;
And remove/comment these two lines from development.rb
&lt;pre class=&quot;brush:ruby&quot;&gt;
config.active_record.mass_assignment_sanitizer = :strict
config.active_record.auto_explain_threshold_in_seconds = 0.5
&lt;/pre&gt;
Rails 2.x:

In config/environment.rb add (or uncomment) the line
&lt;pre class=&quot;brush:ruby&quot;&gt;
config.frameworks -= [ :active_record, :active_resource, :action_mailer ]
&lt;/pre&gt;
This will cause Rails not to use those frameworks. (Note the nearly-invisible -= !)</rev>
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