http://balpreetpankaj.com/blog Just another weblog Sun, 16 Oct 2011 23:32:05 +0000 http://backend.userland.com/rss092 en I normally post only technical stuff on the blog but I had to rant about this nightmare on Delta that I had last night. I was flying DL1152 from Honolulu(boarded on Oct 15th) to San Francisco with my wife and I had my worst flight experience ever right from getting my ... http://balpreetpankaj.com/blog/2011/10/16/delta-nightmare/ I am writing a new javascript library and I wanted the library to work server side ( nodejs ) and in the browser. The main question that I had was how to design my code so that I can use the same files both with node and in the browser. ... http://balpreetpankaj.com/blog/2011/08/07/browser-and-nodejs/ Recently, I was trying to write a greasemonkey script to override the HTMLHeadElement.appendChild function in the browser DOM. Well, the reason I was trying to do that was to redirect a json-p call to my servers instead of the once mentioned in the webpage. Json-p works by dynamically adding a ... http://balpreetpankaj.com/blog/2011/08/07/greasemonkey-and-avoiding-the-sandbox/ I upgraded to Rails 3 and the mysql2 gem. And then: balpreet-pankajs-macbook:youmash balpreetpankaj$ rake db:create rake aborted! dlopen(/opt/local/lib/ruby/gems/1.8/gems/mysql2-0.3.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib Referenced from: /opt/local/lib/ruby/gems/1.8/gems/mysql2-0.3.6/lib/mysql2/mysql2.bundle Reason: image not found - /opt/local/lib/ruby/gems/1.8/gems/mysql2-0.3.6/lib/mysql2/mysql2.bundle (See full trace by running task with --trace) This is when install_name_tool came to the rescue. Apparently mysql2 gem is not ... http://balpreetpankaj.com/blog/2011/07/27/install_name_tool-to-the-rescue/ How many times have you felt like skipping validations on a particular model while writing rspec tests ? Last night, I was trying to write rspec tests for one of my models which tested transactions of money between two users. My user model has tens of validations and I ... http://balpreetpankaj.com/blog/2009/08/09/skip-validations/ If you are using Rails and Facebooker, and you have a resizable Iframe application and you are having problems with resizing, do the following: a) Make sure that the Iframe is set to Resizable in the Facebook appplication settings. b) Instead of calling just <%= init_fb_connect "XFBML" %> (as mentioned in all ... http://balpreetpankaj.com/blog/2009/07/24/facebook-iframe-application-resize-iframe/ I started developing a Facebook app for one of my existing websites.  Since, I already had a working website and I prefer normal html and js over fbml and JS over FBML and FBJS, I decided to take the IFrame route. While working with my app, I ran into this ... http://balpreetpankaj.com/blog/2009/07/24/facebooker-creating-an-iframe-application-incorrect-signature/ SMERF is the meta form generator plugin for Rails. The plugin I would say is very useful. It takes in a form definition file, defined in YAML and creates a form on the fly. These forms are associated to users and the responses to the forms are also persisted in ... http://balpreetpankaj.com/blog/2009/02/10/smerf-and-issues-with-mysql/ I was trying to center an element using the p tag. Like : <p style="margin-left:auto; magin-right:auto; width: 50 em;"> <%= show_simple_captcha %> </p> show_simple_captcha is a helper method from the simple captcha rails plugin. This view helper generates a div which helps in captcha validation. Now, this created a problem. This piece of code ... http://balpreetpankaj.com/blog/2009/01/28/div-inside-a-p-invalid-html/ If you are using action_mailer_tls rails pluin and you shifted to Ruby 1.8.7, your app might break. I recently ran into this problem, coz my host providers shifted to Ruby 1.8.7 and I started getting errors when I was trying to send emails. The problem is because the check_auth_args function ... http://balpreetpankaj.com/blog/2009/01/21/action_mailer_tls-and-ruby-187/