Cartoons van journalist verboden, Volkskrant zwijgt

22 Mar 2008 8:09 - (0) comments

http://www.volkskrantblog.nl/bericht/191036

Ordina puzzle in Ruby

08 Dec 2007 19:14 - (0) comments

Ordina is running a campaign to attract Java developers.

Here is my version of the puzzle in Ruby. For a better comparison I've kept some of the Java style code and refrained from some one liners. Still, it's about half as long as the Java version.
My solution to the puzzle uses wikipedia to lookup the acronyms.

ordina.rb


require 'open-uri'

module Nl

  module Ordina

    class JavaSpecialist

	
      def self.main

        js = find_specialist_wanna_be

        if js

          js.start

        else

          puts "Geen JavaSpecialist implementatie gevonden"

        end

      end

	
      def start

        report = "Volgens de specialist #{name}\x5c\x6eHebben de volgende termen de betekenis" +

                  "\x5c\x6e\x55\x4d\x4c #{eval "waarStaat\x55\x4d\x4cVoor" } \x5c\x6e\x52\x55\x50 " +

                  "#{eval "waarStaat\x52\x55\x50Voor" } \x5c\x6e\x58\x4d\x4c #{eval "waarStaat\x58\x4d\x4cVoor" } " +

                  "\x5c\x6e\x4d\x56\x43 #{eval "waarStaat\x4d\x56\x43Voor" } \x5c\x6e\x45\x4a\x42 " +

                  "#{eval "waarStaat\x45\x4a\x42Voor" }\x5c\x6e\x41\x4f\x50 #{eval "waarStaat\x41\x4f\x50Voor" } " +

                  "\x5c\x6e\x4a\x53\x46 #{eval "waarStaat\x4a\x53\x46Voor" }"

        puts report.gsub!('\n', "\n")

        puts kijk_bij_ordina

      end      

	
      private

	
      def self.find_specialist_wanna_be

        dir = Nl::Ordina.name.gsub('::', '/').downcase

        Dir.new(dir).each{|i| require("#{dir}/#{i}") unless File.directory?("#{dir}/#{i}") }

        Nl::Ordina.constants.each do |i|

          unless i == self.name.split('::').last

            obj = instance_eval(i).new

            return obj if obj.is_a? JavaSpecialist

          end

        end

      end

	
      def kijk_bij_ordina

        open("http://jobportal.ordina.nl/jobportal-front/pages/index.jsf").read

      rescue

        'Kijk op http://jobportal.ordina.nl/'

      end

    end

  end

end

Nl::Ordina::JavaSpecialist.main

nl/ordina/impl.rb


module Nl

  module Ordina

    class JavaSpecialistImpl < JavaSpecialist

      def name

        "p8"

      end

	
      def method_missing(*args)

        afk = args.first.to_s.gsub('waarStaat', '').gsub('Voor', '')

        page = open("http://en.wikipedia.org/wiki/#{afk}").read

        matchdata = /<title>([^>]*)(<\/title>)/.match(page)

        matchdata ? matchdata[1].gsub('- Wikipedia, the free encyclopedia', '') : 'Onbekend'

      end

    end

  end

end

Can't connect to local MySQL server through socket '/var/mysql/mysql.sock'

21 Jul 2007 10:20 - (0) comments

OSX crashed yesterday and after restarting I got the following error in some php apps


Can't connect to local MySQL server through socket '/var/mysql/mysql.sock'.

This happened once before so I'm documenting the proper solution here for possible later use.


sudo /usr/sbin/apachectl stop

apache2ctl start

Setting the default Browser on OSX with Ruby

06 Jul 2007 22:39 - (0) comments

To combat my ADD I want to seperate my work and private browsing. So having two seperate workspaces sounds like a good idea.

I tried Virtue Desktop (and all the other ones) but they were useless to me, because all the virtual desktops show all running applications when switching application with Command+tab. I only want to see the ones in my current desktop.

Creating another user account isn't an option either because I want to access my mail for both work and private use.

So I need a browser switcher I can run from the commandline so I can schedule it with crontab.

The Objective C part

For the Objecive C part I create a SwitchBrowser directory.
In it I create a file called ~/SwitchBrowser/SwitchBrowser.h:


#import 

	
@interface SwitchBrowser : NSObject

{}

- (CFArrayRef) browsers;

- (void)setDefaultBrowser: (CFStringRef) newDefaultStr;

@end

... and a file called ~/SwitchBrowser/SwitchBrowser.m:
(Copied from Giant Mike's FavBrowse)


#import "SwitchBrowser.h"

	
@implementation SwitchBrowser

	
- (CFArrayRef) browsers {

    return LSCopyAllHandlersForURLScheme(CFSTR("https"));

}

	
- (void)setDefaultBrowser: (CFStringRef) newDefaultStr

{

	
	//Set the launch services settings for https:// and http://

	LSSetDefaultHandlerForURLScheme(CFSTR("https"), newDefaultStr);

	LSSetDefaultHandlerForURLScheme(CFSTR("http"), newDefaultStr);

	
	//Set the launch services setting for web sites discovered via Bonjour

	LSSetDefaultRoleHandlerForContentType(CFSTR("public.html"), kLSRolesAll, newDefaultStr);

	
	FSRef newDefaultBrowserFSRef;

	LSFindApplicationForInfo(kLSUnknownCreator, newDefaultStr, NULL, &newDefaultBrowserFSRef, NULL);

	_LSSetWeakBindingForType(kLSUnknownType, kLSUnknownCreator, CFSTR("xhtm"), kLSRolesAll, &newDefaultBrowserFSRef);

}

	
@end

	
void Init_switch_browser(){}

In the SwitchBrowser directory everything is compiled with the following command:

gcc -o switch_browser.bundle -bundle -framework Foundation -framework ApplicationServices -framework AppKit SwitchBrowser.m

The RubyCocoa Part

I use RubyCocoa for the scripting part.
After installing it, create a file called ~/switch_browser.rb:


#!/usr/bin/env ruby

	
require 'osx/cocoa'

require File.dirname(__FILE__) + '/SwitchBrowser/switch_browser'

	
new_browser = $*[0]

	
OSX.ns_import :SwitchBrowser

switcher = OSX::SwitchBrowser.alloc.init

browsers = switcher.browsers.collect{|b| b }

	
unless new_browser

  puts "Select browser number:"

  browsers.each_with_index{|b,i| puts "#{i} #{b}"}

  new_browser = browsers[gets.chomp!.to_i]

end

	
raise "#{new_browser} is not a valid browser." unless browsers.include? new_browser

	
switcher.setDefaultBrowser(new_browser)

puts "Switched to " + new_browser

Now you can do: ~/switch_browser.rb org.mozilla.firefox

I've added this to my crontab together with quiting my work applications on the end of my workday.
It's been a real improvement!

Learning Erlang: Control Structures

06 Jul 2007 22:08 - (0) comments

So far, we haven’t seen any if statements, or switch statements or for statements, or while statements, and yet this doesn’t seem to matter. Everything is written using pattern-matching and higher order functions. So far we haven’t needed any additional control structures.
If we want additional control structures we have a power ful glue that we can use to make our own control structures....

As you become more experienced, you’ll find that being able to create your own control structures can dramatically decrease the size of your programs and sometimes make them a lot clearer. This is because you can create exactly the right control structures that are needed to solve your problem, and you are not restricted by a small and fixed set of control structures that came with your programming language.

Programming Erlang

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