README.md

See https://www.youtube.com/watch?v=4_RJu_TrqO0&feature=youtu.be&t=8h6m40s

$ ruby dilute.rb fib.rb
def fi  n
  if n < 3
    1
  else
    fib(n-1  +  ib(n
  end
end

p  ib 34)
$ ruby dilute.rb fib.rb | ruby
5702887

$ D=80C ruby dilute.rb fib.rb
 e    b n



     ib(

 n

   i  3
$ D=80C ruby dilute.rb fib.rb | ruby
5702887

dilute.rb

#!/usr/bin/env ruby

probability = $stdout.tty? ? (ENV["D"] || 10).to_i : 0
puts ARGF.read.chars.map { |c| rand(100) + 1 <= probability && c !~ /\s/ ? " " : c }.join

fib.rb

def fib n
  if n < 3
    1
  else
    fib(n-1) + fib(n-2)
  end
end

p fib(34)

How does this work. Seems like this line is the reason why it works. I noticed that it outputs to console with whitespace but when it writes to a file it will write without whitespace character probability = $stdout.tty? ? (ENV["D"] || 10).to_i : 0