Emoji spinner in ruby

example.md

You can display a spinning clock while performing network tasks.

puts "Starting nmap scan..."
scan_results = ""
spin_during {
  scan_results = %x(nmap -Pn dillonhafer.com)
}
puts scan_results

spinner.rb

def spin_during
  clocks  = %w(🕛 🕐 🕑 🕒 🕓 🕔 🕕 🕖 🕗 🕘 🕙 🕚)
  working = 0
  timer   = Thread.new do
    while working do
      print clocks[(working+=1) % clocks.length]+' '
      sleep 0.1
      print "\b\b"
    end
  end
  
  yield.tap{
    working = false
    timer.join
  }
end