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<h1>Ruby 2.6.10 p210 2022-04-12 Core & Standard Library</h1>
<ul class='summary'><li><span id='t2_rc' class='summary_signature'><a href='Core/index.html'>Ruby Core</a></span></li></ul>
<h2>Standard Library Summary</h2>
<dl class='summary compact'>
<dt><a href='abbrev/Abbrev.html'>abbrev</a></dt>
<dt><a href='base64/Base64.html'>base64</a></dt>
<dt><a href='benchmark/Benchmark.html'>benchmark</a></dt>
<dt><a href='bigdecimal/BigDecimal.html'>bigdecimal</a></dt>
<dt><a href='bundler/Bundler.html'>bundler</a></dt>
<dt><a href='cgi/CGI.html'>cgi</a></dt>
<dt><a href='cmath/CMath.html'>cmath</a></dt>
<dt><a href='coverage/Coverage.html'>coverage</a></dt>
<dt><a href='csv/CSV.html'>csv</a></dt>
<dt><a href='date/Date.html'>date</a></dt>
<dt><a href='dbm/DBM.html'>dbm</a></dt>
<dt><a href='debug/DEBUGGER__.html'>debug</a></dt>
<dt><a href='delegate/Delegator.html'>delegate</a></dt>
<dt><a href='did_you_mean/index.html'>did_you_mean</a></dt>
<dt><a href='digest/Digest.html'>digest</a></dt>
<dt><a href='drb/DRb.html'>drb</a></dt>
<dt><a href='e2mmap/Exception2MessageMapper.html'>e2mmap</a></dt>
<dt><a href='English/English.html'>English</a></dt>
<dt><a href='erb/ERB.html'>erb</a></dt>
<dt><a href='etc/Etc.html'>etc</a></dt>
<dt><a href='fcntl/Fcntl.html'>fcntl</a></dt>
<dt><a href='fiddle/Fiddle.html'>fiddle</a></dt>
<dt><a href='fileutils/FileUtils.html'>fileutils</a></dt>
<dt><a href='find/Find.html'>find</a></dt>
<dt><a href='forwardable/Forwardable.html'>forwardable</a></dt>
<dt><a href='gdbm/GDBM.html'>gdbm</a></dt>
<dt><a href='getoptlong/GetoptLong.html'>getoptlong</a></dt>
<dt><a href='io-console/IO.html'>io/console</a></dt>
<dt><a href='io-nonblock/IO.html'>io/nonblock</a></dt>
<dt><a href='io-wait/IO.html'>io/wait</a></dt>
<dt><a href='ipaddr/IPAddr.html'>ipaddr</a></dt>
<dt><a href='irb/IRB.html'>irb</a></dt>
<dt><a href='json/JSON.html'>json</a></dt>
<dt><a href='logger/Logger.html'>logger</a></dt>
<dt><a href='matrix/Matrix.html'>matrix</a></dt>
<dt><a href='minitest/index.html'>minitest</a></dt>
<dt><a href='mkmf/MakeMakefile.html'>mkmf</a></dt>
<dt><a href='monitor/Monitor.html'>monitor</a></dt>
<dt><a href='mutex_m/Mutex_m.html'>mutex_m</a></dt>
<dt><a href='net-telnet/index.html'>net/telnet</a></dt>
<dt><a href='net-ftp/Net/FTP.html'>net/ftp</a></dt>
<dt><a href='net-http/Net/HTTP.html'>net/http</a></dt>
<dt><a href='net-imap/Net/IMAP.html'>net/imap</a></dt>
<dt><a href='net-pop/Net/POP3.html'>net/pop</a></dt>
<dt><a href='net-proto/Net/Protocol.html'>net/proto</a></dt>
<dt><a href='net-smtp/Net/SMTP.html'>net/smtp</a></dt>
<dt><a href='nkf/NKF.html'>nkf</a></dt>
<dt><a href='objspace/ObjectSpace.html'>objspace</a></dt>
<dt><a href='observer/Observable.html'>observer</a></dt>
<dt><a href='open-uri/OpenURI.html'>open-uri</a></dt>
<dt><a href='open3/Open3.html'>open3</a></dt>
<dt><a href='openssl/OpenSSL.html'>openssl</a></dt>
<dt><a href='optparse/OptionParser.html'>optparse</a></dt>
<dt><a href='ostruct/OpenStruct.html'>ostruct</a></dt>
<dt><a href='pathname/Pathname.html'>pathname</a></dt>
<dt><a href='power_assert/index.html'>power_assert</a></dt>
<dt><a href='pp/PP.html'>pp</a></dt>
<dt><a href='prettyprint/PrettyPrint.html'>prettyprint</a></dt>
<dt><a href='prime/Prime.html'>prime</a></dt>
<dt><a href='profiler/Profiler__.html'>profile</a></dt>
<dt><a href='profiler/Profiler__.html'>profiler</a></dt>
<dt><a href='pstore/PStore.html'>pstore</a></dt>
<dt><a href='psych/Psych.html'>psych</a></dt>
<dt><a href='pty/PTY.html'>pty</a></dt>
<dt><a href='racc/Racc.html'>racc</a></dt>
<dt><a href='racc-parser/Racc.html'>racc/parser</a></dt>
<dt><a href='rake/index.html'>rake</a></dt>
<dt><a href='rdoc/RDoc.html'>rdoc</a></dt>
<dt><a href='readline/Readline.html'>readline</a></dt>
<dt><a href='resolv/Resolv.html'>resolv</a></dt>
<dt><a href='resolv-replace/index.html'>resolv-replace</a></dt>
<dt><a href='rexml/REXML.html'>rexml</a></dt>
<dt><a href='rinda/Rinda.html'>rinda</a></dt>
<dt><a href='ripper/Ripper.html'>ripper</a></dt>
<dt><a href='rss/RSS.html'>rss</a></dt>
<dt><a href='rubygems/Gem.html'>rubygems</a></dt>
<dt><a href='scanf/Scanf.html'>scanf</a></dt>
<dt><a href='sdbm/SDBM.html'>sdbm</a></dt>
<dt><a href='securerandom/SecureRandom.html'>securerandom</a></dt>
<dt><a href='set/Set.html'>set</a></dt>
<dt><a href='shell/Shell.html'>shell</a></dt>
<dt><a href='shellwords/Shellwords.html'>shellwords</a></dt>
<dt><a href='singleton/Singleton.html'>singleton</a></dt>
<dt><a href='socket/Socket.html'>socket</a></dt>
<dt><a href='stringio/StringIO.html'>stringio</a></dt>
<dt><a href='strscan/StringScanner.html'>strscan</a></dt>
<dt><a href='sync/Sync.html'>sync</a></dt>
<dt><a href='syslog/Syslog.html'>syslog</a></dt>
<dt><a href='tempfile/Tempfile.html'>tempfile</a></dt>
<dt><a href='test-unit/index.html'>test-unit</a></dt>
<dt><a href='thwait/ThreadsWait.html'>thwait</a></dt>
<dt><a href='time/Time.html'>time</a></dt>
<dt><a href='timeout/Timeout.html'>timeout</a></dt>
<dt><a href='tmpdir/Dir.html'>tmpdir</a></dt>
<dt><a href='tracer/Tracer.html'>tracer</a></dt>
<dt><a href='tsort/TSort.html'>tsort</a></dt>
<dt><a href='un/_index.html'>un</a></dt>
<dt><a href='unicode_normalize/index.html'>unicode_normalize</a></dt>
<dt><a href='uri/URI.html'>uri</a></dt>
<dt><a href='weakref/WeakRef.html'>weakref</a></dt>
<dt><a href='webrick/WEBrick.html'>webrick</a></dt>
<dt><a href='win32/_index.html'>win32</a></dt>
<dt><a href='win32ole/WIN32OLE.html'>win32ole</a></dt>
<dt><a href='xmlrpc/index.html'>xmlrpc</a></dt>
<dt><a href='yaml/YAML.html'>yaml</a></dt>
<dt><a href='yaml-dbm/YAML/DBM.html'>yaml/dbm</a></dt>
<dt><a href='yaml-store/YAML/Store.html'>yaml/store</a></dt>
<dt><a href='zlib/Zlib.html'>zlib</a></dt>
</dl>
<h2>Standard Library Detail</h2>
<table class='t2_tbl_1'>
<thead><tr><td>require</td><td>main class</td><td class='t2_c'>lib/ext</td></tr></thead>
<tbody>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='abbrev/Abbrev.html'>abbrev</a></h3></span></td><td>Abbrev</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Calculates a set of unique abbreviations for a given set of strings</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='base64/Base64.html'>base64</a></h3></span></td><td>Base64</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Support for encoding and decoding binary data using a Base64 representation</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='benchmark/Benchmark.html'>benchmark</a></h3></span></td><td>Benchmark</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides methods to measure and report the time used to execute code</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='bigdecimal/BigDecimal.html'>bigdecimal</a></h3></span></td><td>BigDecimal</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides arbitrary-precision floating point decimal arithmetic</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='bundler/Bundler.html'>bundler</a></h3></span></td><td>Bundler</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>The best way to manage your application's dependencies</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='cgi/CGI.html'>cgi</a></h3></span></td><td>CGI</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Support for the Common Gateway Interface protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='cmath/CMath.html'>cmath</a></h3></span></td><td>CMath</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides Trigonometric and Transcendental functions for complex numbers</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='coverage/Coverage.html'>coverage</a></h3></span></td><td>Coverage</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides coverage measurement for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='csv/CSV.html'>csv</a></h3></span></td><td>CSV</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides an interface to read and write CSV files and data</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='date/Date.html'>date</a></h3></span></td><td>Date</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>A subclass of Object includes Comparable module for handling dates</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='dbm/DBM.html'>dbm</a></h3></span></td><td>DBM</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a wrapper for the UNIX-style Database Manager Library</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='debug/DEBUGGER__.html'>debug</a></h3></span></td><td>DEBUGGER__</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Debugging functionality for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='delegate/Delegator.html'>delegate</a></h3></span></td><td>Delegator</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides three abilities to delegate method calls to an object</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='did_you_mean/index.html'>did_you_mean</a></h3></span></td><td>DidYouMean</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>The gem that has been saving people from typos since 2014.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='digest/Digest.html'>digest</a></h3></span></td><td>Digest</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a framework for message digest libraries</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='drb/DRb.html'>drb</a></h3></span></td><td>DRb</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Distributed object system for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='e2mmap/Exception2MessageMapper.html'>e2mmap</a></h3></span></td><td>Exception2MessageMapper</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Module for defining custom exceptions with specific messages</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='English/English.html'>English</a></h3></span></td><td>English</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Require 'English.rb' to reference global variables with less cryptic names</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='erb/ERB.html'>erb</a></h3></span></td><td>ERB</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>An easy to use but powerful templating system for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='etc/Etc.html'>etc</a></h3></span></td><td>Etc</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides access to information typically stored in UNIX /etc directory</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='fcntl/Fcntl.html'>fcntl</a></h3></span></td><td>Fcntl</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Loads constants defined in the OS fcntl.h C header file</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='fiddle/Fiddle.html'>fiddle</a></h3></span></td><td>Fiddle</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>A libffi wrapper for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='fileutils/FileUtils.html'>fileutils</a></h3></span></td><td>FileUtils</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Several file utility methods for copying, moving, removing, etc</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='find/Find.html'>find</a></h3></span></td><td>Find</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>This module supports top-down traversal of a set of file paths</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='forwardable/Forwardable.html'>forwardable</a></h3></span></td><td>Forwardable</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides delegation of specified methods to a designated object</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='gdbm/GDBM.html'>gdbm</a></h3></span></td><td>GDBM</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby extension for the GNU dbm (gdbm) library</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='getoptlong/GetoptLong.html'>getoptlong</a></h3></span></td><td>GetoptLong</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Parse command line options similar to the GNU C getopt_long()</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='io-console/IO.html'>io/console</a></h3></span></td><td>IO</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Extension for Ruby IO class, .console</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='io-nonblock/IO.html'>io/nonblock</a></h3></span></td><td>IO</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Extension for Ruby IO class, #nonblock & #nonblock=</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='io-wait/IO.html'>io/wait</a></h3></span></td><td>IO</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Extension for Ruby IO class, #wait_readable & #wait_writable</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='ipaddr/IPAddr.html'>ipaddr</a></h3></span></td><td>IPAddr</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides methods to manipulate IPv4 and IPv6 IP addresses</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='irb/IRB.html'>irb</a></h3></span></td><td>IRB</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Interactive Ruby command-line tool for REPL (Read Eval Print Loop)</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='json/JSON.html'>json</a></h3></span></td><td>JSON</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Implements Javascript Object Notation for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='logger/Logger.html'>logger</a></h3></span></td><td>Logger</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a simple logging utility for outputing messages</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='matrix/Matrix.html'>matrix</a></h3></span></td><td>Matrix</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Represents a mathematical matrix.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='minitest/index.html'>minitest</a></h3></span></td><td></td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>minitest provides a complete suite of testing facilities supporting TDD, BDD, mocking, and benchmarking.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='mkmf/MakeMakefile.html'>mkmf</a></h3></span></td><td>MakeMakefile</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Module used to generate a Makefile for C extensions</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='monitor/Monitor.html'>monitor</a></h3></span></td><td>Monitor</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides an object or module to use safely by more than one thread</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='mutex_m/Mutex_m.html'>mutex_m</a></h3></span></td><td>Mutex_m</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Mixin to extend objects to be handled like a Mutex</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-telnet/index.html'>net/telnet</a></h3></span></td><td>Net::Telnet</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>Provides telnet client functionality.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-ftp/Net/FTP.html'>net/ftp</a></h3></span></td><td>Net::FTP</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>File Transfer Protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-http/Net/HTTP.html'>net/http</a></h3></span></td><td>Net::HTTP</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Hypertext Transfer Protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-imap/Net/IMAP.html'>net/imap</a></h3></span></td><td>Net::IMAP</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Internet Message Access Protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-pop/Net/POP3.html'>net/pop</a></h3></span></td><td>Net::POP3</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Post Office Protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-proto/Net/Protocol.html'>net/proto</a></h3></span></td><td>Net::Protocol</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Internal Protocol Class</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='net-smtp/Net/SMTP.html'>net/smtp</a></h3></span></td><td>Net::SMTP</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Simple Mail Transfer Protocol</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='nkf/NKF.html'>nkf</a></h3></span></td><td>NKF</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby extension for Network Kanji Filter</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='objspace/ObjectSpace.html'>objspace</a></h3></span></td><td>ObjectSpace</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Extends ObjectSpace module to add methods for internal statistics</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='observer/Observable.html'>observer</a></h3></span></td><td>Observable</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a mechanism for publish / subscribe pattern in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='open-uri/OpenURI.html'>open-uri</a></h3></span></td><td>OpenURI</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>An easy-to-use wrapper for Net::HTTP, Net::HTTPS and Net::FTP</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='open3/Open3.html'>open3</a></h3></span></td><td>Open3</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides access to stdin, stdout and stderr when running other programs</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='openssl/OpenSSL.html'>openssl</a></h3></span></td><td>OpenSSL</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides SSL, TSL and general purpose cryptography for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='optparse/OptionParser.html'>optparse</a></h3></span></td><td>OptionParser</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby-oriented class for command-line option analysis</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='ostruct/OpenStruct.html'>ostruct</a></h3></span></td><td>OpenStruct</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Class to build custom data structures, similar to a Hash</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='pathname/Pathname.html'>pathname</a></h3></span></td><td>Pathname</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Representation of the name of a file or directory on the filesystem</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='power_assert/index.html'>power_assert</a></h3></span></td><td>PowerAssert</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>Power Assert shows each value of variables and method calls in the expression.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='pp/PP.html'>pp</a></h3></span></td><td>PP</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a PrettyPrinter for Ruby objects</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='prettyprint/PrettyPrint.html'>prettyprint</a></h3></span></td><td>PrettyPrint</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Implements a pretty printing algorithm for readable structure</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='prime/Prime.html'>prime</a></h3></span></td><td>Prime</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Prime numbers and factorization library</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='profiler/Profiler__.html'>profile</a></h3></span></td><td></td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Runs the Ruby Profiler__. See profiler</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='profiler/Profiler__.html'>profiler</a></h3></span></td><td>Profiler__</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a way to profile your Ruby application</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='pstore/PStore.html'>pstore</a></h3></span></td><td>PStore</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Implements a file based persistence mechanism based on a Hash</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='psych/Psych.html'>psych</a></h3></span></td><td>Psych</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>A YAML parser and emitter for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='pty/PTY.html'>pty</a></h3></span></td><td>PTY</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Creates and manages pseudo terminals</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='racc/Racc.html'>racc</a></h3></span></td><td>Racc</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'> </td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='racc-parser/Racc.html'>racc/parser</a></h3></span></td><td>Racc</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>A LALR(1) parser generator written in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rake/index.html'>rake</a></h3></span></td><td>Rake</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>Rake is a Make-like program implemented in Ruby.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rdoc/RDoc.html'>rdoc</a></h3></span></td><td>RDoc</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Produces HTML and command-line documentation for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='readline/Readline.html'>readline</a></h3></span></td><td>Readline</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides an interface for GNU Readline and Edit Line (libedit)</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='resolv/Resolv.html'>resolv</a></h3></span></td><td>Resolv</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Thread-aware DNS resolver library in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='resolv-replace/index.html'>resolv-replace</a></h3></span></td><td></td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Replace Socket DNS with Resolv</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rexml/REXML.html'>rexml</a></h3></span></td><td>REXML</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>An XML toolkit for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rinda/Rinda.html'>rinda</a></h3></span></td><td>Rinda</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>The Linda distributed computing paradigm in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='ripper/Ripper.html'>ripper</a></h3></span></td><td>Ripper</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides an interface for parsing Ruby programs into S-expressions</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rss/RSS.html'>rss</a></h3></span></td><td>RSS</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Family of libraries that support various formats of XML feeds</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='rubygems/Gem.html'>rubygems</a></h3></span></td><td>Gem</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Package management framework for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='scanf/Scanf.html'>scanf</a></h3></span></td><td>Scanf</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>A Ruby implementation of the C function scanf(3)</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='sdbm/SDBM.html'>sdbm</a></h3></span></td><td>SDBM</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>A simple file-based key-value store for String keys and values.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='securerandom/SecureRandom.html'>securerandom</a></h3></span></td><td>SecureRandom</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Interface for secure random number generator</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='set/Set.html'>set</a></h3></span></td><td>Set</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides a class to deal with collections of unordered, unique values</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='shell/Shell.html'>shell</a></h3></span></td><td>Shell</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>An idiomatic Ruby interface for common UNIX shell commands</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='shellwords/Shellwords.html'>shellwords</a></h3></span></td><td>Shellwords</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Manipulates strings with word parsing rules of UNIX Bourne shell</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='singleton/Singleton.html'>singleton</a></h3></span></td><td>Singleton</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Implementation of the Singleton pattern for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='socket/Socket.html'>socket</a></h3></span></td><td>Socket</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Access underlying OS socket implementations</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='stringio/StringIO.html'>stringio</a></h3></span></td><td>StringIO</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Pseudo I/O on String objects</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='strscan/StringScanner.html'>strscan</a></h3></span></td><td>StringScanner</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides lexical scanning operations on a String</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='sync/Sync.html'>sync</a></h3></span></td><td>Sync</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>A module that provides a two-phase lock with a counter, see Sync_m</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='syslog/Syslog.html'>syslog</a></h3></span></td><td>Syslog</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby interface for the POSIX system logging facility</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='tempfile/Tempfile.html'>tempfile</a></h3></span></td><td>Tempfile</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>A utility class for managing temporary files</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='test-unit/index.html'>test-unit</a></h3></span></td><td>Test::Unit</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>test-unit (Test::Unit) is unit testing framework for Ruby, based on xUnit principles. It allows writing tests, checking results and automated testing in Ruby.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='thwait/ThreadsWait.html'>thwait</a></h3></span></td><td>ThreadsWait</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Watches for termination of multiple threads</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='time/Time.html'>time</a></h3></span></td><td>Time</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Extends the Time class with methods for parsing and conversion</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='timeout/Timeout.html'>timeout</a></h3></span></td><td>Timeout</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Auto-terminate potentially long-running operations in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='tmpdir/Dir.html'>tmpdir</a></h3></span></td><td>Dir</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Extends the Dir class to manage the OS temporary file path</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='tracer/Tracer.html'>tracer</a></h3></span></td><td>Tracer</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Outputs a source level execution trace of a Ruby program</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='tsort/TSort.html'>tsort</a></h3></span></td><td>TSort</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Topological sorting using Tarjan's algorithm</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='un/_index.html'>un</a></h3></span></td><td></td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Utilities to replace common UNIX commands</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='unicode_normalize/index.html'>unicode_normalize</a></h3></span></td><td>UnicodeNormalize</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Provides three String 'unicode_normalize' methods</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='uri/URI.html'>uri</a></h3></span></td><td>URI</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>A Ruby module providing support for Uniform Resource Identifiers</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='weakref/WeakRef.html'>weakref</a></h3></span></td><td>WeakRef</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Allows a referenced object to be garbage-collected</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='webrick/WEBrick.html'>webrick</a></h3></span></td><td>WEBrick</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>An HTTP server toolkit for Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='win32/_index.html'>win32</a></h3></span></td><td></td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Win32 Registry, SSPI (Security Support Provider Interface)</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='win32ole/WIN32OLE.html'>win32ole</a></h3></span></td><td>WIN32OLE</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Provides an interface for OLE Automation in Ruby</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='xmlrpc/index.html'>xmlrpc</a></h3></span></td><td>XMLRPC</td><td class='t2_c'>gem</td></tr>
<tr class='t2_s'><td colspan='2'>XMLRPC is a lightweight protocol that enables remote procedure calls over HTTP.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='yaml/YAML.html'>yaml</a></h3></span></td><td>YAML</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby client library for the Psych YAML implementation</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='yaml-dbm/YAML/DBM.html'>yaml/dbm</a></h3></span></td><td>YAML::DBM</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>YAML::DBM is a ::DBM type interface which allows YAML for values</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='yaml-store/YAML/Store.html'>yaml/store</a></h3></span></td><td>YAML::Store</td><td class='t2_c'>lib</td></tr>
<tr class='t2_s'><td colspan='2'>Store provides the same functionality as PStore, except it uses YAML to dump objects instead of Marshal.</td></tr>
<tr class='t2_b'><td rowspan='2'><span class='summary_signature'><h3><a href='zlib/Zlib.html'>zlib</a></h3></span></td><td>Zlib</td><td class='t2_c'>ext</td></tr>
<tr class='t2_s'><td colspan='2'>Ruby interface for the zlib compression/decompression library</td></tr>
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