ordering.rb

# Sorry for the confusing stock names. Their name does not indicate the order they should be in. "second" is the only closed stock.

# The original ordering
>> stocks.map(&:name)
=> ["second", "third", "first"]

# Ordering from #sort_by
>> stocks.sort_by { |s| s.closed? ? 1 : 0 }.map(&:name)
=> ["first", "third", "second"]

# Ordering using method from: http://gist.github.com/186847
# This is the correct order I'm seeking.
>> closed_stocks_last(stocks).map(&:name)
=> ["third", "first", "second"]