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# -*- rdoc -*-

NEWS for Ruby 2.1.0 ↑

This document is a list of user visible feature changes made between releases except for bug fixes.

Note that each entry is kept so brief that no reason behind or reference information is supplied with. For a full list of changes with all sufficient information, see the ChangeLog file.

Changes since the 2.0.0 release ↑

Language changes ↑

Core classes updates (outstanding ones only) ↑

  • GC

    • added environment variable:

      • RUBY_HEAP_SLOTS_GROWTH_FACTOR: growth rate of the heap.

  • IO

    • extended methods:

      • IO#seek accepts symbols (:CUR, :END, :SET) for 2nd argument.

  • Kernel

    • New methods:

      • Kernel#singleton_method

  • Module

    • New methods:

      • Module#using, which activates refinements of the specified module only in the current class or module definition.

  • Mutex

    • misc

      • Mutex#owned? is no longer experimental.

  • String

    • New methods:

      • String#scrub and String#scrub! verify and fix invalid byte sequence.

    • extended methods:

      • If invalid: :replace is specified for String#encode, replace invalid byte sequence even if the destination encoding equals to the source encoding.

  • pack/unpack (Array/String)

    • Q! and q! directives for long long type if platform has the type.

  • toplevel

    • extended methods:

      • main.using activates refinements in the ancestors of the argument module to support refinement inheritance by Module#include.

Core classes compatibility issues (excluding feature bug fixes) ↑

  • IO

    • incompatible changes:

      • open ignore internal encoding if external encoding is ASCII-8BIT.

  • Kernel#untrusted?, untrust, and trust

    • These methods are deprecated and their behavior is same as tainted?, taint, and untaint, respectively. If $VERBOSE is true, they show warnings.

  • Module#ancestors

    • The ancestors of a singleton class now include singleton classes, in particular itself.

  • Numeric#quo

    • Raises TypeError instead of ArgumentError if the receiver doesn’t have to_r method.

Stdlib updates (outstanding ones only) ↑

  • Digest

    • extended methods:

      • Digest::Class.file takes optional arguments for its constructor

  • Matrix

    • Added Vector#cross_product.

  • Net::SMTP

    • Added Net::SMTP#rset to implement the RSET command

  • Pathname

    • New methods:

      • Pathname#write

      • Pathname#binwrite

  • OpenSSL::BN

    • extended methods:

      • OpenSSL::BN.new allows Fixnum/Bignum argument.

  • open-uri

    • Support multiple fields with same field name (like Set-Cookie).

  • Resolv

    • New methods:

      • Resolv::DNS.fetch_resource

    • One-shot multicast DNS support

    • Support LOC resources

  • Rinda::RingServer, Rinda::RingFinger

    • Rinda now supports multicast sockets. See Rinda::RingServer and Rinda::RingFinger for details.

  • RubyGems

  • Socket

    • New methods:

      • Socket.getifaddrs

  • StringScanner

    • extended methods:

      • StringScanner#[] supports named captures.

  • Tempfile

    • New methods:

      • Tempfile.create

  • CGI::Util

    • All class methods modulized.

  • XMLRPC::Client

    • New methods:

      • XMLRPC::Client#http. It returns Net::HTTP for the client. Normally, it is not needed. It is useful when you want to change minor HTTP client options. You can change major HTTP client options by XMLRPC::Client methods. You should use XMLRPC::Client methods for changing major HTTP client options instead of XMLRPC::Client#http.

Stdlib compatibility issues (excluding feature bug fixes) ↑

  • URI

    • incompatible changes:

      • URI.decode_www_form follows current WHATWG URL Standard. It gets encoding argument to specify the character encoding. It now allows loose percent encoded strings, but denies ;-separator.

      • URI.encode_www_form follows current WHATWG URL Standard. It gets encoding argument to convert before percent encode. UTF-16 strings aren’t converted to UTF-8 before percent encode by default.

Built-in global variables compatibility issues ↑

  • $SAFE

    • $SAFE=4 is obsolete. If $SAFE is set to 4 or larger, an ArgumentError is raised.

C API updates ↑