Monthly Archives: August 2012

PowerBuilder Datawindow Grid delete selected rows efficiently

Posted on August 24, 2012 by

Today I wanted to delete the selected rows of a datawindow grid in Powerbuilder. When I say delete I wanted just to remove them from the screen and not from the database. I used deleteRow(long row) function but it was … Continue reading →

Posted in PowerBuilder | Tagged , , , , , , , | Leave a comment

Perl UTF-8 and Regular Expressions

Posted on August 15, 2012 by

Today I wanted to explore Perl’s Unicode and regular expression capabilities, so I wrote down this simple script. It is quite amazing how simply Perl handles strings and regular expressions! Otherwise you have to use multiple sed or egrep commands … Continue reading →

Posted in Linux | Tagged , , , , , , | 1 Comment

Java Calculate Orthodox Easter Date

Posted on August 14, 2012 by

Today I wondered if there is an algorithm to calculate the date of Orthodox Easter. After some searching in the web I found the algorithm and converted it to Java code.

Posted in Android, Java | Tagged , , , | Leave a comment

Ubuntu Debian Linux useful commands

Posted on August 10, 2012 by

Updated: 2015-09-08 Change keyboard layout to support both English (US) and Greek (GR) Audjust monitor brightness and gamma Find top 10 largest files in / Source: cybercity Find IP without using ifconfig Run logrotate Curl get http code and store … Continue reading →

Posted in Linux | Tagged , , , , | Leave a comment

Java get file size and download using HTTP

Posted on August 9, 2012 by

Today I wanted to download a file using Http protocol but before that determine its size. First aff all I open an Http connection and get file size using Content-Length header (see getFileSize method). Then I download the binary file. … Continue reading →

Posted in Java | Tagged , , , , | Leave a comment

PowerBuilder 10 Get and Set System Language

Posted on August 7, 2012 by

Today I wanted to retrieve the selected system language from PowerBuilder 10. To accomplish that I had to do some search in the web. After a long period I found this post in Google Groups. It seems that Powerbuilder datawindow … Continue reading →

Posted in PowerBuilder | Tagged , , , , | 2 Comments