Sudoku Solver Source Code
Here is the source code of one of the most used sudoku solvers. It serves the this online sudokusolver.
How to edit OpenSeSim Source Code in Netbeans
OpenSesim is an open source stock exchange simulator, where you can find the source code on Gitlab here. To work with the source code on OpenSesim it's recommended to use the Netbeans IDE. If you are using Ubuntu 18.04, you can find here instructions to install Netbeans. You can clone the source directly in Netbeans.… Read More »
Install Netbeans 8.2 on Ubuntu 18.04
First you have to install OpenJDK 8 because Netbeans doesn't work with OpenJDK 11 which is installed on Ubuntu 18.04 by default. sudo apt-get install openjdk-8-jdk Next download here the Netbeans installer of your choice for Linux. If you chose Netbeans IDE Java SE you should get the file: netbeans-8.2-javase-linux.sh. Now start the installer, setting… Read More »
Aironet AP IOS Recovery - Flashing an AP 1142N or a Similar Device using TFTP on Ubuntu/Debian
Ok. You want to flash the firmware of a Cisco 1140, Cisco 1130 or any other Aironet AP. So, download here the desired image you want to install, if you haven't already done so. To install the image we have to setup a TFTP server on our Ubuntu/Debian system. We assume you have opened a… Read More »
Bad Coding Style (I)
Look at the following PHP code snipped. It's a function which calculates the product of its two arguments and returns the result if both arguments are of type integer. Otherwise the function returns false. So far so good. The function does what it should do, and I have seen a lot of functions written this… Read More »
Simulating the Impact of UASF / BIP148 on Bitcoin
To get a better prediction of UASF impact on bitcoin, I wrote a quick and dirty bitcoin network simulator, which you can find here on GitHub. After playing around with all kinds of hash rate distributions and UASF/non-UASF nodes, my first conclusion is, that there is almost no impact of UASF nodes on bitcoin, if… Read More »
How to Setup a Bitcoin BIP148/UASF Node on FreeBSD
Assuming you have a fresh FreeBSD (or a jail) installed, and you are logged in as root, download the latest version of BIP148 enabled bitcoin sources from here as .tar.gz file and untar it. As of writing it is v0.14.1-uasfsegwit0.3.tar.gz. fetch https://github.com/UASF/bitcoin/archive/v0.14.1-uasfsegwit0.3.tar.gz tar xzvf v0.14.1-uasfsegwit0.3.tar.gz cd bitcoin-0.14.1-uasfsegwit0.3 Next the documentation in ./doc/build-unix.md tells us which… Read More »
Open Sesim!
There is now a dedicated page for SeSim - Open Source Stock Exchange Simulator. New releases and other information will be found there.
SeSim - First Pre-Alpha
Now you can download a first rudimentary version of SeSim, the Stock Exchange Simulator as announced here. It was tested under Windows and Linux. You can download the jar file uSeSim_001_alpha.jar which you can run, if java is installed on your computer. To play around with, create first a strategy, by going to edit->strategies, pressing… Read More »
Bitcoin vs. Gold
Bitcoin was raising, and the price for one Bitcoin is now around the same as for one ounce of gold. So isn't it insane to pay for one Bitcoin as much as for one ounce of gold? According to this article there are currently between 155,244 tonnes and 2.5 million tonnes of gold in the… Read More »