Read and write to spreadsheet in Java

I was writing an algorithm that would run and produce some results. These results should have been stored some place and retrieved during next program run. New values would then be added to the resulting list. The program needed to remember all the results from all run.

Parse Apache log files with Python

We run our website on Apache servers and they generate a huge amount of log files every day. Looking through these files is a full time job, so we decided to parse them automatically to retrieve the data about possible 404 and 403 errors.

Send email with Python

Sending emails with Python scripts is easy if you have a server running. There are several libraries you need to use.

Replace string in XML file with Python

In this example we will show how to read XML and CSV files with Python, and perform search and replace operations. The result will be written into a new file with the same filename, but with “_new” appended to the filename.

Integrating LibreOffice into C++

At our math website we publish printable PDF worksheets for school children. We’ve just started publishing crosswords, while relatively easy to create, they require much work to make them into tasks.

C++ unsigned int problems

Primitives in C++ language can have signed and unsigned values. Signed means that they may be both positive and negative. Unsigned values may be only positive, but as a result may hold more values.

How to sell well on Fiverr

As of today I’m a level 2 seller on Fiverr. In this article I would like to share some tips and tricks on how to sell well on Fiverr, how to deal with difficult customers and orders that you can’t do right.