# -*- rdoc -*-
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.
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Now the default values of keyword arguments can be omitted. Those “required keyword arguments” need giving explicitly at the call time.
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Added suffixes for integer and float literals: ‘r’, ‘i’, and ‘ri’.
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“42r” and “3.14r” are evaluated as Rational(42, 1) and 3.14.rationalize, respectively. But exponential form with ‘r’ suffix like “6.022e+23r” is not accepted because it is misleading.
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“42i” and “3.14i” are evaluated as Complex(0, 42) and Complex(0, 3.14), respectively.
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“42ri” and “3.14ri” are evaluated as Complex(0, 42r) and Complex(0, 3.14r), respectively.
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def-expr now returns the symbol of its name instead of nil.
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Added ‘f’ suffix for string literals that returns a frozen String object.
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Array
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New methods
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Array#to_h converts an array of key-value pairs into a Hash.
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Binding
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New methods
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Binding#local_variable_get(symbol)
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Binding#local_variable_set(symbol, obj)
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Binding#local_variable_defined?(symbol)
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Enumerable
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New methods
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Enumerable#to_h converts a list of key-value pairs into a Hash.
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GC
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added environment variable:
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RUBY_HEAP_SLOTS_GROWTH_FACTOR: growth rate of the heap.
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Integer
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New methods
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Fixnum#bit_length
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Bignum#bit_length
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Bignum performance improvement
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Use GMP if available. GMP is used only for several operations: multiplication, division, radix conversion, GCD
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IO
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extended methods:
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IO#seek supports SEEK_DATA and SEEK_HOLE as whence.
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IO#seek accepts symbols (:CUR, :END, :SET, :DATA, :HOLE) for 2nd argument.
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IO#read_nonblock accepts optional ‘exception: false` to return symbols
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IO#write_nonblock accepts optional ‘exception: false` to return symbols
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Kernel
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New methods:
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Kernel#singleton_method
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Module
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New methods:
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Module#using, which activates refinements of the specified module only in the current class or module definition.
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Module#singleton_class? returns true if the receiver is a singleton class or false if it is an ordinary class or module.
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extended methods:
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Module#refine is no longer experimental.
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Module#include and Module#prepend are now public methods.
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Mutex
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misc
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Mutex#owned? is no longer experimental.
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Numeric
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extended methods:
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Numeric#step allows the limit argument to be omitted, in which case an infinite sequence of numbers is generated. Keyword arguments ‘to` and `by` are introduced for ease of use.
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Process
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New methods:
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alternative methods to $0/$0=:
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Process.argv0() returns the original value of $0.
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Process.setproctitle() sets the process title without affecting $0.
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Process.clock_gettime
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Process.clock_getres
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RbConfig
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New constants:
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RbConfig::SIZEOF is added to provide the size of C types.
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String
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New methods:
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String#scrub and String#scrub! verify and fix invalid byte sequence.
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extended methods:
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If invalid: :replace is specified for String#encode, replace invalid byte sequence even if the destination encoding equals to the source encoding.
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Symbol
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All symbols are now frozen.
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pack/unpack (Array/String)
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Q! and q! directives for long long type if platform has the type.
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toplevel
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extended methods:
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main.using is no longer experimental. The method activates refinements in the ancestors of the argument module to support refinement inheritance by Module#include.
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IO
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incompatible changes:
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open ignore internal encoding if external encoding is ASCII-8BIT.
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Kernel#eval, Kernel#instance_eval, and Module#module_eval.
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Copies the scope information of the original environment, which means that private, protected, public, and module_function without arguments do not affect the environment outside the eval string. For example, ‘class Foo; eval “private”; def foo; end; end’ doesn’t make Foo#foo private.
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Kernel#untrusted?, untrust, and trust
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These methods are deprecated and their behavior is same as tainted?, taint, and untaint, respectively. If $VERBOSE is true, they show warnings.
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Module#ancestors
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The ancestors of a singleton class now include singleton classes, in particular itself.
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Module#define_method and Object#define_singleton_method
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Now they return the symbols of the defined methods, not the methods/procs themselves.
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Numeric#quo
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Raises TypeError instead of ArgumentError if the receiver doesn’t have to_r method.
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Proc
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Returning from lambda proc now always exits from the Proc, not from the method where the lambda is created. Returing from non-lambda proc exits from the method, same as the former behavior.
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CGI::Util
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All class methods modulized.
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Digest
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extended methods:
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Digest::Class.file takes optional arguments for its constructor
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Matrix
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Added Vector#cross_product.
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Net::SMTP
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Added Net::SMTP#rset to implement the RSET command
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Pathname
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New methods:
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Pathname#write
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Pathname#binwrite
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OpenSSL::BN
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extended methods:
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OpenSSL::BN.new allows Fixnum/Bignum argument.
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open-uri
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Support multiple fields with same field name (like Set-Cookie).
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rake
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Updated to 10.1.0. Major changes include removal of the class namespace, Rake::DSL to hold the rake DSL methods and removal of support for legacy rake features.
For a complete list of changes since rake 0.9.6 see:
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RDoc
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Updated to 4.1.0.preview.1. Major enhancements include a modified default template and accessibility enhancements.
For a list of minor enhancements and bug fixes see: github.com/rdoc/rdoc/blob/v4.1.0.preview.1/History.rdoc
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Resolv
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New methods:
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Resolv::DNS.fetch_resource
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One-shot multicast DNS support
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Support LOC resources
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REXML::Parsers::SAX2Parser
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Fixes wrong number of arguments of entitydecl event. Document of the event says “an array of the entity declaration” but implemenation passes two or more arguments. It is an implementation bug but it breaks backword compatibility.
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REXML::Parsers::StreamParser
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Supports “entity” event.
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REXML::Text
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REXML::Text#<< supports method chain like ‘text << “XXX” << “YYY”’.
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REXML::Text#<< supports not “raw” mode.
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Rinda::RingServer, Rinda::RingFinger
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Rinda now supports multicast sockets. See Rinda::RingServer and Rinda::RingFinger for details.
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RubyGems
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Updated to 2.2.0.preview.1 For a list of enhancements and bug fixes see: github.com/rubygems/rubygems/blob/v2.2.0.preview.1/History.txt
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Set
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New methods:
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Set#intersect?
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Set#disjoint?
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Socket
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New methods:
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Socket.getifaddrs
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StringScanner
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extended methods:
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StringScanner#[] supports named captures.
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Syslog::Logger
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Added facility.
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Tempfile
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New methods:
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Tempfile.create
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Timeout
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No longer an exception to terminate the given block can be rescued inside the block, by default, unless the exception class is given explicitly.
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TSort
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New methods:
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TSort.tsort
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TSort.tsort_each
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TSort.strongly_connected_components
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TSort.each_strongly_connected_component
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TSort.each_strongly_connected_component_from
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WEBrick
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The body of a response may now be a StringIO or other IO-like that responds to #readpartial and #read.
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XMLRPC::Client
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New methods:
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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.
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objspace
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new method:
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ObjectSpace.trace_object_allocations
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ObjectSpace.trace_object_allocations_start
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ObjectSpace.trace_object_allocations_stop
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ObjectSpace.trace_object_allocations_clear
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ObjectSpace.allocation_sourcefile
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ObjectSpace.allocation_sourceline
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ObjectSpace.allocation_class_path
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ObjectSpace.allocation_method_id
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ObjectSpace.allocation_generation
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ObjectSpace.reachable_objects_from_root
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Set
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incompatible changes:
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Set#to_set now returns self instead of generating a copy.
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URI
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incompatible changes:
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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.
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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.
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$SAFE
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$SAFE=4 is obsolete. If $SAFE is set to 4 or larger, an ArgumentError is raised.
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