Kanban Certification
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Kanban Certification

IBQMI® Kanban Certification Keeping ahead of the competition in the business market has become an essential goal for companies. Many industries are saturated and competition is not only becoming tougher but closer. Kanban at a glance Kanban brings inventory levels and actual consumption side by side. The process is designed to produce an indicator that […]

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Favourite excuse

Posted in coffee break

New word of the day: My code did not fail! I just found another method that will not solve this problem …

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Project Euler – problem 3 in Ruby

Posted in coffee break, Ruby

This is part three of our mathematical soultions-series in Project Euler: The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? Now we can have a short and a detailed version to solve this problem. The short one is nearly a joke with […]

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Project Euler – problem 2 in Ruby

Posted in coffee break, Ruby

Hi folks, this is part two of our soultions-series for the mathematical problems in Project Euler. Project Euler – problem number two: “Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, […]

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Project Euler – mathematical problem 1

Posted in coffee break, Ruby

I recently heared about “Project Euler” from a friend. For all of those who have not heared about this project: “Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.” The first mathematical problem to solve was: If we list all the natural numbers below […]

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Chip Online – Ruby on Rails book review

Posted in coffee break, Rails

Happy new 2013! Because the world didn’t end in 2012 (you know, Maya calendar and conspiracy …) I had a bit time in my holidays over Xmas and wrote an article at http://blog.chip.de/itrezensionen. For those who never heard about this site: You can find there tons of reviews for IT books. Whenever you want to […]

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Rails input size is 30 chars

Posted in coffee break, Rails

Just a quick fix, but leads often to confusion … Let’s say we have a form 1<%= form_for link , url:link_path(link) , remote:true do |f| -%> now we want to insert an input field like 1<%= f.text_field :email, placeholder:’Email’, :title => ‘email’ %> this will will give you a HTML like this 1<input type="text" title="email" […]

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Postgresql and TCP/IP connections on port 5432

Posted in coffee break, console

When working with Postgresql, I got the error 1234PG::Error could not connect to server: Connection refused     Is the server running on host "localhost" (127.0.0.1) and accepting     TCP/IP connections on port 5432? This can happen, if you didn’t configure your server specifically. To see if your Postgresql is accepting requests, simply run […]

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Ruby on Rails mobile view

Posted in coffee break

Finally I had enough time at the weekend to care about my blog and the mobile views. My blog now detects devices like iPhones, iPads, Android & and more, serving its optimized theme instead of my regular desktop theme. You can always switch back to standard/desktop theme if you wish (the button is in the […]

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Ruby on Rails performance issues

Posted in coffee break, Rails, Ruby

I was thinking several times about this message and discussed it with some friends: http://engineering.twitter.com/2011/04/twitter-search-is-now-3x-faster_1656.html Twitter started to rewrite their search engine using Lucene instead of MySQL and replaced the Ruby-on-Rails front-end by a Java server, which is supposedly to be faster … ?!? As you can read in the article: “Over time, we had […]

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