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// Typically, mordern client systems limit it 60 milliseconds
const FRAME_LIMIT = 100 // milliseconds, naaive

const TDFC = (MAXROW, cb) => {
  return new Promise(resolve => {
    const maxRow = MAXROW;
    let cursor = 1; // start point
    let partialMax = 10; // minimal loop block
    let before = new Date().getTime();
    let result;

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// Warning!: It is not yet prevented for race condition!
const mine = { js: { type: 'application/javascript' } };

const WorkerPromise = f => {
  let resolve;
  let reject;
  const worker = Object.assign(
    new Worker(
      URL.createObjectURL(
        new Blob([`onmessage = e => postMessage((${f})(e.data));`], mine.js),

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const ExcelJS = require('exceljs');
const workbook = new ExcelJS.Workbook();
const data = await workbook.xlsx.readFile('./test.xlsx');

const worksheet = workbook.worksheets[0];
for (const image of worksheet.getImages()) {
  console.log('processing image row', image.range.tl.nativeRow, 'col', image.range.tl.nativeCol, 'imageId', image.imageId);
  // fetch the media item with the data (it seems the imageId matches up with m.index?)
  const img = workbook.model.media.find(m => m.index === image.imageId);
  fs.writeFileSync(`${image.range.tl.nativeRow}.${image.range.tl.nativeCol}.${img.name}.${img.extension}`, img.buffer);

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# 개발환경을 새로 잡을 일이 있어서 defualt setting을 기록

# Install bundle with pathogen for package manage
> mkdir -p ~/.vim/autoload ~/.vim/bundle && \
> curl -LSso ~/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim

# Init pathogen
# No source, parsed from vim
> echo "execute pathogen#infect()" >> ~/.vimrc
# execute pathogen#infect()

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# Memo for new_dev_env
# Install zsh to shell theme
# MAC(Catalina~) default shell is zsh already 

# 1. Install zsh
> sudo apt install zsh
> brew install zsh(MAC)

# 2. Change bash to zsh
# and select option: 0

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# How to set github on MacOS
# First if you use wsl2 ubuntu, try this: git.exe clone [remote-repo]
# Or git config --global credential.helper "/mnt/c/Program\ Files/Git/mingw64/libexec/git-core/git-credential-manager-core.exe"

# 1. Generate public key
$ ssh-keygen -t ed25519 -C "your_email@example.com"

# 2. Copy to clipboard public key
$ pbcopy ~/.ssh/id_ed25519.pub
# 2-1) if on Ubuntu

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# Also you need to alias command or make shell script 
# alias diff="git diff --no-index"
git diff --no-index some/path other/path >> some_filename

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# 0. Move home directory
$ cd ~
# 1. Rename corrupted zsh_history
$ mv .zsh_history .zsh_history_bad
# 2. Encoding zsh_history_bad
$ strings -eS .zsh_history_bad > .zsh_history
# 3. Read history from file
$ fc -R .zsh_history

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#!/bin/bash

$ sudo update-alternatives --config editor

There are 4 choices for the alternative editor (providing /usr/bin/editor).

  Selection    Path                Priority   Status
------------------------------------------------------------
* 0            /bin/nano            40        auto mode
  1            /bin/ed             -100       manual mode

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#!/bin/bash

minikube start --driver=docker