Question

How to cache “puts” and “print” results, and save it to variable. Like ob_start() and ob_get_contents() in php.

Answer 1

require 'stringio'

save_so, $stdout = $stdout, StringIO.new(' ', 'w')
puts 'how now brown cow'
my_so, $stdout = $stdout, save_so

p [:saved_result, my_so.string]
puts 'and this works once again'