默认加载哪些 ruby​​ 模块？

直到最近，我还认为所有标准模块（那些可以在http://ruby-doc.org/stdlib/ http://ruby-doc.org/stdlib/) 默认情况下不加载。也就是说，您必须要求您将要使用的每一个。但从内容来看，确实有一些是被加载的$LOADED_FEATURES:

$ 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"]

所以我想知道原因是什么，我可以以任何方式影响它吗？

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"]

我看到的唯一加载的库是 RubyGems，它确实是在 1.9.0 中添加到 Ruby 中的。

顺便说一句：你不require modules, you require files.