Thoughts about Java and more
After the 2nd hardware breakdown of a Lenovo Thinkpad in just 5 years I was ready to try something I never thought I would do I bought an Apple device, a used MacBook Pro M2. Installing Asahi Linux on it was a very smooth ride and I was able to be one of the [ ]
There are few use cases for connecting a transmitter to multiple receivers. One use case is failover , which ensures that a malfunctioning receiver won t crash your model. For this use case the channels of the transmitter are all mapped to the same channels for all receivers, i.e. some kind of a parallel binding type: (Of [ ]
In Java there are several ways to convert a byte array into an integer. Let s assume little endian order for all examples. If you need big endian order you can use can use Integer.reverseBytes. 1. ByteBuffer byte[] byteArray = new byte[] {1, 2, 3, 4}; int intValue = ByteBuffer.allocate(4).put(byteArray).getInt(0); System.out.println(intValue); System.out.println(Integer.toBinaryString(intValue));…
For a brief introduction into project Valhalla you need to read this wiki at OpenJDK or watch e.g. this talk from Brian Goetz. Basically it changes the layout of data in memory and introduces a possibility to define compact collections of objects. Currently only arrays of primitive types like int[] or double[] are compact . Long [ ]
Three years ago I blogged about the Thinkpad T460 that I newly bought. And I was very pleased with it. Until the mainboard broke a few weeks ago. Just when the 3 years warranty would have been over, but luckily I bought the 5 year warranty extension with on-site support. The CPU or something froze [ ]
Update: since Ubuntu 18.04 this is not longer necessary as the software update triggers this and everything is done automatically. In the following I describe the process to update the BIOS of a Lenovo Laptop that runs Linux for the recent problems related to Spectre. 1. Download the BIOS update Bootable CD from Lenovo, which [ ]
After several years with my Dell Latitude E6400 I was searching for a new, more powerful Linux machine for my coding and performance tweaking tasks. And although the Dell XPS line sounded interesting due to the native Linux support, it was also expensive with 16GB RAM and 3 year warranty ( 2200€) and several users reported [ ]
Although I m now in the GIS business for years I had never to deal with shapefiles directly. Now it was time also to investigate tools like QGIS and hack together a simple reader for shp files. At least I thought it was simple but calling me a GIS expert afterwards would be a ridiculous understatement. [ ]
First of all, this is not a rant nor am I a (regular) mapper but I have some years of experience to read aka interpret OSM data. I invite mappers to read, understand and comment on this post (in this order ;)). Learning and understanding a specific tag When I learn about a new tag [ ]
The GraphHopper blog has moved to graphhopper.com/blog This blog is now a fully personal one again 😉