Come on, dude!

Usability of Human Interfaces

admin — Mon, 08 Feb 2010 22:32:52 +0000

View more presentations from Anton Arhipov.

How to pass JSON UTF-8 from Smarty template to Open Flash Chart 2

admin — Wed, 27 Jan 2010 09:22:45 +0000

Recently I ran into the problem with passing UTF-8 JSON from Smarty to Open Flash Chart 2. By default Smarty is striping slashes from all variables that it passes to the template, and JSON is converting every UTF-8 Character with ‘\u’ in the beginning. Of cause Smarty was returning only ‘u’.

To force Smarty to pass variables with slashes you can do next:

1	$this->smarty->assign("chart", addslashes($chart->toString()) );

After that $chart will have correct JSON with correct UTF-8 Characters

The Office Season 4 (Andy asks out Angela)

admin — Sun, 20 Dec 2009 10:17:25 +0000

Come on, McDonalds

admin — Sun, 01 Nov 2009 14:08:44 +0000

Why I have to pay for ketchup in your “fast food restaurant” in Russia?

Howto install rails on Ubuntu 8.04 LTS Server

admin — Fri, 02 Oct 2009 11:16:55 +0000

If you have Ubuntu 8.04 LTS Server and you are installing rails from gem, you most propbably will run into the problem when rack will need thin and thin will need rack and this will create infinitive loop. There is a very simple and fast fix for it. All you have to do is update RubyGems. Please keep in mind that update will remove all your installed gems and you will have to install it once again.

sudo gem update --system

Then you have to remove old gem file from /usr/bin and link it to newer one.

1 2	sudo mv /usr/bin/gem /usr/bin/gem.bak sudo ln -s /usr/bin/gem1.8 /usr/bin/gem

After that you should be able to install Rails with following command:

sudo gem install rails

Happy coding!

Ruby: how to use specific version of the gem

admin — Thu, 01 Oct 2009 11:15:26 +0000

Let’s imagine that you have something like this:

1 2	maksim@enormo-081:~$ sudo gem list\|grep hpricot hpricot (0.8.1, 0.6)

Now, to use 0.6 version of hpricot in Ruby you must use following:

1 2	gem 'hpricot', '=0.6' require 'hpricot'

Happy coding!

Command to switch Java in Ubuntu

admin — Tue, 29 Sep 2009 14:40:58 +0000

maksim@kpoxa:~$ sudo update-alternatives --config java

Netbeans and wxRuby on Ubuntu Jaunty

admin — Sun, 27 Sep 2009 10:10:35 +0000

I have been playing lately with Ruby because some of my work topics are involve now writing scripts in Ruby. Scripts are generally used for collecting information. I came up with idea to make some cross-platform GUI for co-workers that they can easily access and view collected information by my Ruby scripts. So I have decided to use wxRuby as GUI toolkit.

First off, we need wxRuby to be installed. This is super easy to install it on your Ubuntu box.

maksim@kpoxa:~$ sudo gem install wxruby

Please remember that you need to have wxWidgets (libwxbase and libwxgtk2.x as well) to be installed on your PC. To make sure that wxRuby is up and running you can try to run one of the sample that comes with wxRuby gem. Try the following:

maksim@kpoxa:~$ ruby -rubygems /usr/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-linux/samples/minimal/minimal.rb

If you will see a nice but empty window, that means that wxRuby is working!

Now, after this is done and wxRuby is working we need to set up IDE to recognize gem.

I’m using Netbeans as my main IDE for all languages that I use for coding. Go to Tools > Ruby Platforms. Next you have to add one more path to Gem path. In our case it’s /usr/lib/ruby/gems/1.8 Please see picture below:

After this is done, you should be able to run this sample by pressing F6 with no problems!

Only one downside here that seems that there is no autocomplete at the moment.

Happy coding!

Symfony sfGuardUser “remember me” fix for those who use Doctrine

admin — Fri, 28 Aug 2009 19:02:10 +0000

I had a feeling that I did something wrong while installing a plugin into Symfony and that’s why sfGuardUser RememberMe feature did not work for me. After surfing the web I have found one year old Russ Flynn’s “Symfony sfGuardUser “remember me” checkbox/cookie does not work” post. Turns out it’s not only me. Russ had very nice solution, but the only downside was that it was written for Propel. I have edited rememberMeFilter.class.php and made it to use Doctrine instead of Propel. Check it out!

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class rememberMeFilter extends sfFilter
{
public function execute ($filterChain)
{
// execute this filter only once, and if the user is not already logged in, and has a cookie set
if ($this->isFirstCall() && !$this->getContext()->getUser()->isAuthenticated()
&& $this->getContext()->getRequest()->getCookie(sfConfig::get('app_sf_guard_plugin_remember_cookie_name', 'sfRemember')))
{
// See if a user exists with this cookie in the remember database

// Doctrine implemetation
$query = Doctrine_Query::create();
$query->select('r.*, u.*');
$query->from('sfGuardRememberKey r');
$query->leftJoin('r.sfGuardUser u');
$query->where('r.remember_key = ?', array($this->getContext()->getRequest()->getCookie(sfConfig::get('app_sf_guard_plugin_remember_cookie_name', 'sfRemember'))));
$query->andWhere('r.ip_address = ?', array($this->getContext()->getRequest()->getHttpHeader ('addr','remote')));

$result = $query->fetchOne()->getReferences();

if($result)
{
$this->getContext()->getUser()->signIn($result['sfGuardUser']);
}
}
// execute next filter
$filterChain->execute();
}
}

PHP 5.3.0 now have goto operator

admin — Mon, 24 Aug 2009 10:33:23 +0000

What’s how it will look like:

Image courtesy of xkcd.com

Nice small “comeondude” discussion here