- module/class
- json
- date
- file
- class Pathname
- class File
- module FileTest
- module FileUtils - but is not included or extended there
- class File::Stat
- class Tempfile
- class Dir
- class IO
- module File::Constants
- class StringIO
- module IO::generic_readable
- IO::generic_writable
- url
- URI
decode_www_formdecode_www_form_componentdecode_uri_component保留+符号- JavaScript#URLSearchParams
- URI::Parser
- URI
- csv
- other
- extension
.rb, .so, .o, .dll
docs-ruby
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