elzup

const { readdir } = require('fs').promises

const readdirRecursiveEnt = async (dir, ent) => {
  const path = `${dir}/${ent.name}`
  if (ent.isFile()) return path
  if (ent.isDirectory()) {
    return await readdirRecursive(path)
  }
  console.log(`${ent.name} is not a file or directory`)
  return null

elzup

import fs from 'fs'
import { promisify } from 'util'
import network from 'network'

const getActiveInterface = promisify(network.get_active_interface)
const getCurrent = async () => (await getActiveInterface())?.mac_address

const SAVE_FILE = 'home.mac.txt'

const saveHomeNetwork = (id: string) => fs.writeFileSync('home.mac.txt', id)

elzup

import { useEffect, useRef } from 'react'
import fitty from 'fitty'

export function useFitty() {
  const ref = useRef<HTMLDivElement>(null)

  useEffect(() => {
    if (!ref.current) return
    fitty(ref.current)
    ref.current.addEventListener('fit', (e) => {

elzup

// perrin(n) / n === 0
//  =
//   isPrime(n)

const perrinMemo: [bigint, bigint, bigint] = [0n, 2n, 3n]
const primeMemo: number[] = [2, 3]

function perrinNext(): bigint {
	const next = perrinMemo[0] + perrinMemo[1]
	perrinMemo[0] = perrinMemo[1]

elzup

#!/bin/bash

# this script dependence "pup", "jq"
USERNAME=$1

SELECTOR='tr:nth-child(2) span:nth-child(1) json{}'
USERDATA=$(curl -s https://atcoder.jp/users/$USERNAME |pup $SELECTOR)
COLOR=$(echo $USERDATA |jq --raw-output ".[0].class" |sed 's/user-//')
RATE=$(echo $USERDATA |jq --raw-output ".[0].text")

elzup

#!/bin/bash

# this script dependence "pup", "jq"
USERNAME=$1

SELECTOR='tr:nth-child(2) span:nth-child(1) json{}'
USERDATA=$(curl -s https://atcoder.jp/users/$USERNAME |pup $SELECTOR)
COLOR=$(echo $USERDATA |jq --raw-output ".[0].class" |sed 's/user-//')
RATE=$(echo $USERDATA |jq --raw-output ".[0].text")

elzup

{
  "name": "competitive-pg-wrokspace",
  "version": "1.0.0",
  "main": "index.js",
  "author": "elzup <guild0105@gmail.com>",
  "license": "MIT",
  "devDependencies": {
    "@types/node": "^13.5.3",
    "atcoder-cli": "^2.0.4",
    "eslint": "^6.8.0",

elzup

const nextDay = () => new Date().setHours(0, 0, 0, 0) + 24 * 60 * 60 * 1000
const tommorowFromNow = () => nextDay() - new Date()

setTimeout(() => {
  // code
}, tommorowFromNow())

elzup

#!/bin/sh

cat ~/.chpwd-recent-dirs \
  | sed -e 's/^..\(.*\)./\1/g' \
  | while read line
do
  if [ -d "$line" ]; then
    echo "\$'$line'"
  fi
done

elzup

import * as functions from 'firebase-functions'
import * as admin from 'firebase-admin'

admin.initializeApp({
  credential: admin.credential.applicationDefault(),
  // databaseURL: 'https://hoge.firebaseio.com/',
})

export const api = functions.https.onRequest(async (req, res) => {
  const message = {