Software (Auswahl)
LinAlg -- The Linear-Algebra Scala Library
LinAlg provides data types and operations for algebraic vectors and matrices.
Vector and Matrix elements can be of arbitrary type, provided that a factory for that element type is available. Currently, factories exist for Double, Float, Long, Int, Short, Byte and Char.
SimGraf -- A Simple Scala Graphics Library
This is a Scala library of graphics utilities. It is focused on simple drawing of shapes and functions without the need of instructing the graphics system by a dozen or so settings before a simple picture is shown. It is not meant to program graphical user interfaces with buttons, menus and so on.
SI -- A Scala Library of Units of Measurement
This is a Scala library of units of measurement featuring the International System of Units (SI).
The main types defined are Quantity and Unit.
Utilib -- A Scala Library of Programming Utilities
This is a Scala library of programming utilities. It is not intended to comprise a systematic collection but contains some tools that happen to be useful for myself and may be of interest for others.
Algolib -- A Scala Library of Essential Algorithms
This is a Scala library of essential algorithms.
It starts with Scala implementations of some algorithms from the book Algorithms 4 by Robert Sedgewick and Kevin Wayne [1]. Further adaptations from this book will be added from time to time. Other algorithms may go into this library as well.
PA-Toolbox -- Predictive-Analytics Java Toolbox
This is a Java library of some tools that happened to be useful in a predictive-analytics environment. In fact, most of them are not specific to this area and might be of general interest.
There is also a Scala interface for some sub modules, currently for pa-toolbox-linalg and pa-toolbox-plotting. It simplifies the use of these modules with Scala in general and with my LinAlg Scala Library in particular.
Anleitungen (Auswahl)
Web Server in a Sandbox
There are different methods to get a sandbox environment. Here, we use the Firejail Security Sandbox, which allows to assign a private sealed scope to a service and all associated processes; this includes resources like network access, process table or filesystem. Therewith, the service only sees its own processes and can only access the part of the filesystem that has been assigned tio it.
Extracting Multiple Subtrees from a Git Repository
Git
Multiple subtrees of a Git repository shall be extracted and transferred to a new archive while keeping the version history.
Git provides different approaches to solve this task. Here, we use the git-subtree command to create branches from the subtrees to be detached. Then, these branches will be imported from another repository. Sources were the manpage (man git-subtree) and this answer on stackoverflow along with some comments listed there.
Improving Mailserver Reputation
It is quite easy to set up a mailing system on your own server, but more often than not the recipients of your mails find them in their spam or junk folder – if at all. The reason is that most mail providers establish procedures to block unsolicited mails we have to deal with nowadays.