yowcow

const main = async () => {
  try {
    const ret = await new Promise(() => {
      setTimeout(() => {
        throw new Error('error in setTimeout');
      }, 1);
    });
    console.log(`promise succeeded: ${ret}`);
  } catch (err: unknown) {
    console.error(`promise failed: ${err}`);

yowcow

Regexp Lookaround Memo
======================

Lookahead
---------

```
❯ echo "hoge\nfuga\nhoge1\nfuga11\nhoge111\nfuga1111" | grep -P 'hoge(?=\d+)'
hoge1
hoge111

yowcow

CN := test.x28.co

all: test.key test.crt

%.key:
	openssl genrsa \
		-out $@ \
		2048

%.crt: %.key

yowcow

-module(myproc).

-include_lib("kernel/include/logger.hrl").

-export([
         start_link/0
        ]).

%%
%% {ok, Pid} = myproc:start_link()

yowcow

<?php

interface RandomGeneratorInterface
{
    public function getString(int $length): string;
    public function getBytes(int $length): string;
}

class RandomFileReader implements RandomGeneratorInterface
{

yowcow

head -c 4 /dev/urandom | perl -Mfeature=say -ne 'say unpack("h*", $_);'

yowcow

PKG := google-chrome-stable
DEB := $(PKG)_current_amd64.deb

all: $(DEB)

$(DEB):
	curl -L https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb -o $@

info: $(DEB)
	dpkg -I $<

yowcow

cat input.xml | xmllint --format -

yowcow

#!/bin/sh
#
# Reference: https://unix.stackexchange.com/questions/453069/configuring-kensington-slimblade-in-linux
#
# Kensington Slimblade Trackball Button IDs:
#
#     .------+------.
#     |  2   |   8  |
#     |   .--+--.   |
#     +---+ 4/5 +---+

yowcow

# list available outputs
xrandr
xrandr --query

# set HDMI-2 output as 3840x2160, to the left of eDP-1
xrandr --output HDMI-2 --mode 3840x2160 --left-of eDP-1

# set HDMI-2 output as 3840x2160, to mirror eDP-1
xrandr --output HDMI-2 --mode 3840x2160 --same-as eDP-1