koji

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu bionic-security main"
sudo apt-get -y install build-essential checkinstall cmake unzip pkg-config yasm
sudo apt-get -y install git gfortran python3-dev
sudo apt-get -y install libjpeg8-dev libjasper-dev libpng12-dev libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine2-dev libv4l-dev
sudo apt-get -y install libjpeg-dev libpng-dev libtiff-dev libtbb-dev
sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libatlas-base-dev libxvidcore-dev libx264-dev libgtk-3-dev

# download opencv source code version 3.4.4
cd

koji

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-key 421C365BD9FF1F717815A3895523BAEEB01FA116
sudo apt-get -y update
sudo apt-get -y upgrade

sudo apt-get -y install ros-kinetic-desktop-full
apt-cache search ros-kinetic

sudo rosdep init

koji

$ sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
$ sudo apt-get install --install-recommends linux-generic-lts-xenial xserver-xorg-core-lts-xenial xserver-xorg-lts-xenial xserver-xorg-video-all-lts-xenial xserver-xorg-input-all-lts-xenial libwayland-egl1-mesa-lts-xenial
$ sudo update-grub && sudo reboot

$ sudo apt-get install git libssl-dev libusb-1.0-0-dev pkg-config libgtk-3-dev
$ sudo apt-get install libglfw3-dev (16)

koji

OCR_app

OCR App

Install Tesseract 4.0 on MacOS

$ brew install tesseract --HEAD
$ pip install pytesseract

koji

# coding: utf-8
import random
hiragana = ""
for i in range(5):
    k = random.randint(ord('あ'),ord('ん'))
    hiragana = hiragana + chr(k)

print(hiragana)

koji

Anaconda

update
$ conda update conda

create virtual env
$ conda create --name py35 python=3.5 

list env

koji

const arr = [100, 0, 45, 66, 89, 200]; 
arr.sort((a,b)=>{ return a-b; }); 
console.log(arr);

koji

$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get dist-upgrade
$ sudo do-release-upgrade

koji

$ pip install something
Command "python setup.py egg_info" failed with error code 1

$ sudo pip install --upgrade setuptools

koji

In this case, I'm using cmder.
Windows machine has Virtual box and vagrant.

setup vagrant

$ vagrant box add ubuntu/trusty64
$ vagrant init ubuntu/trusty64
$ vagrant up