[01-08-2019]
And Now for Something Completely Different – Wojtek Justyna TreeOh!
Radio RAM nie zawodzi ;) Tym razem, dzięki nim, dowiedziałem się o zespole Wojtek Justyna TreeOh!. Grają niesamowicie sympatyczny, spokojny, nieprzekombinowany Jazz, którego bardzo miło się słucha – szczególnie wtedy, gdy za oknem robi się ciemno. Nienatarczywy towarzysz wieczornej lektury książek, ale jako tło dla domówki też sie nada. A tutaj link do ich strony […]
[01-08-2019]
And Now for Something Completely Different – Altered Carbon
Zdecydowanie lepsza od interpretacji Netflixa
[01-08-2019]
And Now for Something Completely Different – Company of One
Company of One is … everything
[31-07-2019]
eternity – defined using macOS keyboard settings
To learn what eternity means, change your keyboard setting from this to this
[25-07-2019]
Running JAR file from R using rJava (without spawning new process)
Let’s say we have this, very simple, structure of the project where StringTest.java is a very simple Java class while Manifest.txt contains We can easily create JAR (“executable”) from these files using jar application Now, let’s try to run this code inside R. It’s quite straightforward.
[25-07-2019]
R, Java 11 and making sure you can load rJava
As usual, there are some issues with new Java releases (11 and 12) and R. If you want to run rJava package inside R you have to do few things. First, make sure you are using Java 11 as default inside terminal session. Inside ~/.profile add this line export JAVA_HOME=$(/usr/libexec/java_home -v 11) Once it’s done, […]
[08-07-2019]
macOS Mojave and accessing TimeMachine’s
data from command line (iTerm2)
Whenever I restore (setup) new Mac, I do it manually. I simply install clean system, and transfer what I really need from TimeMachine’s backup – typically using CLI. In Mojave it’s a no-no. If you use iTerm2, you will face following issue while accessing data inside TimeMachine’s storage. > cd /Volumes/TimeMachine/Backups.backupdb/ > ls ls: .: […]
[15-06-2019]
Passing vector of vectors to Java from C++ using JNI
While using JNI, it becomes a little bit of burden whenever you want to pass something more complex than simple types back to Java.
[12-06-2019]
How to find files that have certain string in last line
Let’s say you have few files string |– 1 |– 2 |– 3 |– 4 |– 5 |– 6 |– 7 |– 8 `– 9 And they may end with two different endings: aaa or bbb. Finding list off files that have given string at the end can be done following way > find string […]
[11-06-2019]
Running Java code in R
Let’s say you have a Java class StringTest package somepackage; public class StringTest { public String changeString(String str) { return "I have changed the string: " + str; } } inside file src `– somepackage `– StringTest.java and you want to run it in R. All you have to do is to compile the code. […]
[27-05-2019]
And Now for Something Completely Different – Interwencje 2
Zbiory felietonów – one zawsze niosą ze sobą pewne ryzyka :(
[23-05-2019]
Be careful with JVM library location while building JNI based code
In case you want to compile JNI based code on macOS, be careful. Pay attention to @rpath. If you compile the code like this ld -L${JAVA_HOME}/lib/server -ljvm … you will end up with reference to /usr/local/lib/libjvm.dylib. You may face lots of issues related to incorrect `JVM` version used while linking `JNI`. If you want to […]
[21-05-2019]
And Now for Something Completely Different – Królestwo
Do kompletu to chyba brakuje jeszcze tylko Królewicza.
[19-05-2019]
And Now for Something Completely Different – Modern Java in Action
If you have stuck with pre 1.8 Java but you have to go back to the future, it’s definitely worth it!
[08-05-2019]
VNC – The first attempt to start Xvnc failed
At some point I was struggling with the strange issue. It came out of nowhere. VNC simply stopped working. Eventually, it turned out that reason was completely awkward. Missing directory on LD_LIBRARY_PATH. Yes, I know how it sounds, but it’s true. You can try it by yourself > setenv LD_LIBRARY_PATH /some_fake_location > vncserver -geometry 800×600 […]
[08-05-2019]
Stopping node.js – an elegant way
If you want to stop node.js you have basically two ways: – brute force (⌃ – C), – gentle way, via socket inside your application. I will show you how to do that using simple code (https://nodejs.org/en/about/). /* app.js */ const http = require(‘http’); const hostname = ‘127.0.0.1’; const port = 3000; const server = […]