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.
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=$(/usr/libexec/java_home -v 11) Once it’s done, […]
Whenever I restore (setup) new Mac, I do it manually. I simply install clean system, and transfer what I really need from TimeMachine’s backup – typically using CLI. In Mojave it’s a no-no. If you use iTerm2, you will face following issue while accessing data inside TimeMachine’s storage. > cd /Volumes/TimeMachine/Backups.backupdb/ > ls ls: .: […]
While using JNI, it becomes a little bit of burden whenever you want to pass something more complex than simple types back to Java.
Let’s say you have few files string |– 1 |– 2 |– 3 |– 4 |– 5 |– 6 |– 7 |– 8 `– 9 And they may end with two different endings: aaa or bbb. Finding list off files that have given string at the end can be done following way > find string […]
Let’s say you have a Java class StringTest package somepackage; public class StringTest { public String changeString(String str) { return "I have changed the string: " + str; } } inside file src `– somepackage `– StringTest.java and you want to run it in R. All you have to do is to compile the code. […]
Zbiory felietonów – one zawsze niosą ze sobą pewne ryzyka :(
In case you want to compile JNI based code on macOS, be careful. Pay attention to @rpath. If you compile the code like this ld -L${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 […]
Do kompletu to chyba brakuje jeszcze tylko Królewicza.
If you have stuck with pre 1.8 Java but you have to go back to the future, it’s definitely worth it!
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 […]
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 = […]
You still remember good old days with your Atari/Commodore machine. You like to annotate the code and you miss line numbers so much void main() { loop: printf("Hello\n"); goto loop; } You like it ‘low level’ style. In high school you were the master of assembler. There is nothing wrong about working with bare metal, […]
This error drove me crazy for a while. Find one difference :) @import ‘~@angular/material/prebuilt-themes/deeppurple-amber.css’ body { padding: 0; } @import ‘~@angular/material/prebuilt-themes/deeppurple-amber.css’; body { padding: 0; }
> find . -not -iwholename ‘*.svn*’ -type f -name "*" > find . -not -iwholename ‘*.git*’ -type f -name "*"
⌘ – U+2318 ⌥ – U+2325 ⇧ – U+21E7 ⌃ – U+2303 ⌫ – U+232B If you don’t know how to type Unicode characters in mac OS, take a look here: Unicode frames in macOS.
1. Start Chrome 2. Open the page 3. Open DevTools (⌥⌘I) 4. Open the Command Menu (⇧⌘P) 5. Choose Capture full size screenshot