fork download 
  1. require 'socket'
  2. puts (1...65536).map {|p| [p, (s=TCPSocket.new('localhost', p)).read.tap {s.close}].join(' => ') rescue nil}.compact
Success #stdin #stdout 4.71s 8488KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/bHlSVo
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
public

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