vmi

# https://unix.stackexchange.com/a/31955

sed -i -e '$a\' file

vmi

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Main {

    public static void main(String[] args) throws ScriptException {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");
        System.out.println(engine.toString());

vmi

# https://stackoverflow.com/questions/6458990/how-to-format-a-number-1000-as-1-000
n = 1234567890
puts n.to_s.gsub(/(\d)(?=\d{3}+(?!\d))/, "\\1,")

vmi

Linuxパッケージマネージャー機能対応表

操作	apt	dnf	pacman
パッケージ一覧更新	sudo apt update	sudo dnf check-update	sudo pacman -Sy
パッケージインストール	sudo apt install PACKAGE	sudo dnf install PACKAGE	sudo pacman -S PACKAGE
パッケージ削除	sudo apt remove PACKAGE	sudo dnf remove PACKAGE	sudo pacman -R PACKAGE
パッケージ検索	apt search KEYWORD	dnf search KEYWORD	pacman -Ss KEYWORD
アップグレード	sudo apt upgrade	sudo dnf upgrade	sudo pacman -Syu