Monthly Archives: March 2013

Selvakumar Chokalingam 4:40 AM on March 11, 2013  

Merging Pdf’s in Rails application

bob-roberts.net

Alright, I had a lot of fun today trying to figure out how to merge pdf’s in our Rails application.

We are using pdfkit to create our pdf’s.  What I needed to do was to take several pdf’s and merge them into one large pdf.  Frankly I did not think it was even possible.  I found several Ruby gems that were supposed to do the job but everyone I tried was just another PITA dead end.

After getting pointed in the right direction by @m3talsmith, I ended up solving my issue the old school way.  So, if you have done this before with Ruby gems stick with it.  If not, here we go…

I first started with an empty array for pdfs.  Then I went thru a couple of processes to add all the pdfs to the pdfs array.

After that, comes the old school.  Using Ghostscript (gs) we joined…

View original post 57 more words

Selvakumar Chokalingam 9:54 AM on March 4, 2013  

Detecting Mobile Browser via Gem

Step 1: Install the gem ‘browser’

gem install browser

Step 2: Add it to Gemfile or environment.rb

gem "browser"         #=> Rails 3
config.gem "browser"  #=> Rails 2

Step 3: Implement

require "browser"
browser.name        # readable browser name
browser.safari?
browser.opera?
browser.chrome?
browser.mobile?
browser.tablet?
browser.firefox?
browser.ie?
browser.ie6?        # this goes up to 9
browser.capable?    # supports some CSS 3
browser.platform    # return :mac, :windows, :linux or :other
browser.mac?
browser.windows?
browser.linux?
browser.blackberry?
browser.meta        # an array with several attributes
browser.to_s        # the meta info joined by space

Example:-

<% if browser.ie6? %>
  <p>You're running an older IE version. Please update it!</p>
<% end %>