哪些ruby模块默认加载？
直到最近，我才认为默认情况下不会加载所有标准模块（那些可以在http://ruby-doc.org/stdlib/上看到的模块）。 也就是说，您必须要求使用您要使用的每一个。 但事实certificate，从$LOADED_FEATURES内容来看，其中一些确实被加载了：
$ ruby -rpp -e 'p $LOADED_FEATURES' ["enumerator.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/enc/encdb.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/enc/trans/transdb.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/rbconfig.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/compatibility.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/defaults.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/deprecate.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/errors.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/version.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/requirement.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/platform.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/specification.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/exceptions.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/core_ext/kernel_gem.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/prettyprint.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/pp.rb"]
所以我想知道是什么原因，我能以任何方式影响这个吗？
UPD输出无需pp
$ ruby -e 'p $LOADED_FEATURES' ["enumerator.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/enc/encdb.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/enc/trans/transdb.so", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/x86_64-linux/rbconfig.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/compatibility.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/defaults.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/deprecate.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/errors.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/version.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/requirement.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/platform.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/specification.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/exceptions.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/core_ext/kernel_gem.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb", "/home/yuri/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/rubygems.rb"]
我看到加载的唯一库是RubyGems，而且确实在1.9.0中添加了Ruby。
顺便说一句：你require module ，你require文件。