lexruee

def diff_array(first_array, second_array)
  (first_array - second_array) + (second_array - first_array)
end

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def find_missing_letter(range)
  chars = range.chars
  max_char = chars.max
  min_char = chars.min
  missing_chars = (min_char..max_char).to_a - chars
  missing_chars.first
end

p find_missing_letter "abde"
p find_missing_letter "abcdefgijk"

lexruee

gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 931FF8E79F0876134EDDBDCCA87FF9DF48BF1C90
yay -S spotify

lexruee

git clone https://github.com/rubocop-hq/ruby-style-guide
cd ruby-style-guide
pandoc README.md -o ruby-code-style-guide.html

lexruee

# Ubuntu 14.04 LTS Upgrade zu Ubuntu 16.04.5 LTS

```
sudo apt update
sudo apt upgrade
sudo apt install update-manager-core 
sudo do-release-upgrade
```

## Nachdem Upgrade auf Ubuntu 16.04 LTS

lexruee

Introduction

• C-a == Ctrl-a
• M-a == Alt-a

General

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

lexruee

Ethminer 0.14.0.dev1

Installation on GNU/Linux

git clone https://github.com/ethereum-mining/ethminer
cd ethminer; mkdir build; cd build
cmake ..
cmake --build .
sudo make install

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Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/artful64"
  config.vm.provider 'virtualbox' do |v|
    v.gui = true
  end
  
  config.vm.provision "shell", inline: <<-SHELL
    apt-get update -y
    apt-get dist-upgrade -y
    apt-get install -y git make

lexruee

dconf write /org/gnome/desktop/input-sources/xkb-options "['caps:escape']"

lexruee

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname