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  • Home
  • Portfolio
    • (Deutsch) Benchmarking
    • (Deutsch) Digitale Spedition
    • Learning system for truck drivers
    • Phone-Apps
    • (Deutsch) Lagerverwaltung für einen Großhandelskonzern
    • (Deutsch) Mobile Windkraftinspektion
    • (Deutsch) Newspaper Utilities
    • Cycosmos
    • Color management for textile printing
    • (Deutsch) Management mobiler Daten
    • Mobile education for electricians
    • (Deutsch) Notfallserver
    • Parallelize wind tunnel computing
    • Police Manuals Online
    • Programming Cookbook
    • Visualisation for Concrete Factory
  • About Karsten Meier
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Category Archives: Programming

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Friday August 21st, 2009

Rotating Billboard with jQuery

In 1998, I have presented “Meier’s billboard”, A virtual display panel with changing images. Technically it is a Java-applet. Unfortunately, the reputation of Java-applets in the browser was bad and there was not much interest in my Java-applets. In the … Continue reading →

Posted by: Karsten Meier | Conversation: 0 comments | Category: Programming | Tags: JavaScript, jQuery, Billboard

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Tuesday May 12th, 2009

Multilingual Websites with Ruby on Rails (2)

Part 2 – Variables, Validations, Model Classes Web pages often contains sentences in which a single word is changing. For example, “You are logged in as xxxx.” For the translation, we can obviously assemble the sentence from the components. There … Continue reading →

Posted by: Karsten Meier | Conversation: 1 comment | Category: Programming | Tags: multilingualism, Ruby, Validations

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Monday May 4th, 2009

SQL: Set a Field from a linked Table

A little hack for the Joomla Community Builder Recently, I received a job request. An existing web application will be greatly expanded, and therfore converted to use the CMS “Joomla”. For the management of members  the extension “Community Builder” will … Continue reading →

Posted by: Karsten Meier | Conversation: 1 comment | Category: Programming | Tags: join, Joomla, Sql

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Saturday April 11th, 2009

Multilingual Websites with Ruby on Rails

Part 1 – Overview Writing software for several languages is an ever recurrent challenge. Ruby on Rails provides solutions to most of the standard problems in web development. But it needed time until the version 2.2. for the “Internationalization API … Continue reading →

Posted by: Karsten Meier | Conversation: 1 comment | Category: Programming | Tags: multilingualism, Ruby, Translation

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Saturday March 14th, 2009

(Deutsch) Turing Award für Barbara Liskov

Posted by: Karsten Meier | Conversation: 1 comment | Category: Programming | Tags: Abstraction, CLU, Liskov, Ruby, yield

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Sunday November 23rd, 2008

Compare Strings with PHP

In my programming work I often switch between different programming languages. It’s not so difficult, but problems sometimes appear just at very simple things. Strings in PHP are really easy to compare, there is the “==” operator. But there lurks … Continue reading →

Posted by: Karsten Meier | Conversation: 1 comment | Category: Programming | Tags: Traps, Php, Strings

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Friday September 5th, 2008

Slip Danger: Google Sitemaps

Slip DangerMost website owners want their pages to be well found through Google. So Google needs to be aware of each of your web pages and “understand” them. In order to help Google to find each important page, you can … Continue reading →

Posted by: Karsten Meier | Conversation: 0 comments | Category: Programming | Tags: Automatic, SEO, Sitemap, Webmaster

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Wednesday August 6th, 2008

How to fetch remote data with the App Engine

You can use the App Engine to retrieve web pages or other information from foreign servers and process them in your python program. This must obviously be limited, because the abuse potential is very high. Therefore you can not call … Continue reading →

Posted by: Karsten Meier | Conversation: 0 comments | Category: Programming | Tags: AppEngine, Cloud, fetch, howto, Mashup, Python, SSL

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Thursday July 17th, 2008

Upload Files with the AppEngine

If you want process an uploaded file in a cgi-programm, you often need to juggle with temporary files. How to do it with the Python in the AppEngine? Because you don’t have write access to a traditonal file system in … Continue reading →

Posted by: Karsten Meier | Conversation: 0 comments | Category: Programming | Tags: AppEngine, Cloud, File Upload, file upload, Python

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Friday July 4th, 2008

App Engine: first notes

My first impressions and some notes about programming for Googles App Engine. Continue reading →

Posted by: Karsten Meier | Conversation: 0 comments | Category: Programming | Tags: AppEngine, Cloud, Python, webapp

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About me

Hello, my name is Karsten Meier. I'm a computer scientist from Hamburg, Germany. I write since 1996 for this website about topics from life with big and small computers. And sometimes I use this site for experiments.

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Adventure Android AppEngine Challenge China Cloud CoCreation CSS Culture Design Diagramme e-learning Enterprise Gadgets Google Ilias Innovation IOT Java JavaScript JME jQuery Konzeption LMS LWUIT Mapplet MDM MFP multilingualism Mystery NFC Performance Php Python quality assurance Ruby scaling Security Smart City Sql Strings Traps UX Validations webapp

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Stack Overflow

profile for Meier at Stack Overflow, Q&A for professional and enthusiast programmers

Projects

  • Colleta
  • Coobeya
  • Handylearn Projects
  • mlearning

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