## Without inject
#!/usr/bin/env ruby
# use env, not a hardcoded path to where the executable might be...

class Array # we have an OO language, pseudo-functions--, methods++
  def largest # find is somewhat redundant
    return nil if empty? # handle the edge-case early

    largest = numbers.first # .first just reads nicer than [0]
    each { |i| largest = i if i > largest }

    largest
  end
end

numbers = []

while input = gets # end with ctrl-D
  numbers << input.to_i # .chomp is not needed with .to_i
end

puts "The biggest number out of #{numbers.join(', ')} is #{numbers.largest}"

## With inject
#!/usr/bin/env ruby
# use env, not a hardcoded path to where the executable might be...

module Enumerable
  def largest
    inject { |largest, obj| obj > largest ? obj : largest }
  end
end

numbers = []

while input = gets # end with ctrl-D
  numbers << input.to_i # .chomp is not needed with .to_i
end

puts "The biggest number out of #{numbers.join(', ')} is #{numbers.largest}"