From: Jon Hawkins <globyy3000@...>
Date: 2007-08-13T06:00:13+09:00
Subject: stdin stdout -ing my program

i need to be able to run my program fully from the command line, instead
of 'ruby program.rb'....i need to pipe the commands using standard input
and output.
How would i do this with the code below?

Code:

require 'find'
Dir.chdir("/")
res = []
Find.find("/") {|path| res << File.size( path).to_f if File.file?(
path)}
puts "Total Number of Files: #{res.length}"
puts "Average File Size: #{res.inject(0) {|sum, i| sum +
i}/res.length/1024} Kilobytes"
puts "Max File Size: #{res.max/1024}KB"
puts "Min File Size: #{res.min}KB"
puts "================================"
puts "================================"
res.delete_if {|b| b < 1}
puts "Weighted Average: #{res.inject(0) {|sum, i| sum +
i}/res.length/1024} Kilobytes"

 # Lol Standard Deviation

def mean(res)
res.inject(0) {|sum, x| sum += x} / res.size.to_f / 1024
end
def mean_and_standard_deviation(res)
m = mean(res)
variance = res.inject(0) {|variance, x| variance += (x - m) ** 2}
Math.sqrt(variance/(res.size - 1)) / 1024
end
puts "Standard Deviation = #{mean_and_standard_deviation(res)}"
##############

So how would i pipe find from a shell command?
Thanks,

-Jon
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