Polyfill

Polyfill implements newer Ruby features into older versions. If the Ruby version already supports the polyfill then calling it does nothing. This is designed to allow gem maintainers to use newer methods and gain their advantages while retaining backwards compatibility. It can also be used for code that would like newer features but is not completely ready to upgrade Ruby versions. The polyfills are built using refinements so there is no monkey patching that may cause issues outside of your use.

• Installation
• Goals
• Usage
  • Polyfill
  • Polyfill.get
• Implementation Table
  • 2.6
  • 2.5
  • 2.4
  • 2.3
  • 2.2

Installation

Add it to your Gemfile:

gem 'polyfill', '~> 1.8'

Or install it manually:

$ gem install polyfill

This project uses Semantic Versioning.

Goals

1. Features should ideally mimic the true behavior (quirks, error messages, etc).
2. Features should not significantly burden the runtime.
3. Keep everything modular so users can be specific or broad in their usage.

Usage

Polyfill

With the Polyfill method, you can polyfill methods for one or more Ruby objects. Each object is passed as a key. The value is an array of strings containing the methods you would like to polyfill. Instance methods need to start with "#" and class methods need to start with ".".

using Polyfill(
  Array: %w[#concat],
  Dir: %w[.empty?],
  Hash: %w[#compact! #transform_values]
)

If you want all of the methods for a particular object you can use :all in place of the array.

using Polyfill(Numeric: :all)

Polyfills can be halted at a maximum version with the :version option. The version must be a string with the major and minor version only.

using Polyfill(version: '2.3', Numeric: :all)

When you add a method it will not be available in all of the ways a normal method is. For example, you can't call send on a refined method prior to Ruby 2.4. To gain back some of this support you can set native: true. This currently adds support for respond_to?, __send__, and send.

using Polyfill(native: true, Numeric: :all)

Polyfill.get

Prior to Ruby 2.4, refinements do not work on Modules. When using a polyfill on a module it will instead refine the core classes that use the module. If you're building your own class, it will not receive the polyfill. Instead, you can include (or extend or prepend) in a polyfill with Polyfill.get.

class Foo
  include Comparable
  include Polyfill.get(:Comparable, :all)
end

To use specific methods you can pass an array of symbols in place of :all.

class Foo
  include Comparable
  include Polyfill.get(:Comparable, %i[clamp])
end

Like before, the polyfills can be halted at a maximum version with the :version option. The version must be a string with the major and minor version only.

class Foo
  include Comparable
  include Polyfill.get(:Comparable, :all, version: '2.3')
end

Implementation Table

✓ = Implemented, ✗ = Not Implemented, P = Partially Implemented

Partial implemented features will be explained in the "Changes" section of the table. The explanation will follow "Differences:".

2.6

	Object	Method	Changes
✓	Array	#difference	New
✗		#filter	New (alias of select)
✗		#filter!	New (alias of select!)
✓		#to_h	Accepts a block that maps elements to new key/value pairs.
✓		#union	New
✗	Binding	#source_location	New
✗	Coverage	.line_stub	New
✗		.result	Accepts new optional keyword arguments, :clear and :stop.
✗		.start	Accepts a new optional keyword argument, :oneshot_line.
✗	Dir	#children	New
✗		#each_child	New
✗	Enumerable	#+	New
✗		#chain	New
✗		#filter	New (alias of select)
✓		#to_h	Accepts a block that maps elements to new key/value pairs.
✗	Enumerator::Lazy	#filter	New (alias of select)
✗	ENV	#to_h	Accepts a block that maps elements to new key/value pairs.
✗	ERB	.new	Accepts new optional keyword arguments, :eoutvar and :trim_mode.
✗	Exception	#full_message	Accepts new optional keyword arguments, :highlight and :order.
✗	File	.binread	Does not invoke external commands even if the path starts with |.
✗		.binwrite	Does not invoke external commands even if the path starts with |.
✗		.foreach	Does not invoke external commands even if the path starts with |.
✗		.read	Does not invoke external commands even if the path starts with |.
✗		.readlines	Does not invoke external commands even if the path starts with |.
✗		.write	Does not invoke external commands even if the path starts with |.
✗	FileUtils	#cp_lr	New
✗	Hash	#filter	New (alias of select)
✗		#filter!	New (alias of select!)
✓		#merge	Accepts multiple arguments.
✓		#merge!	Accepts multiple arguments.
✓		#to_h	Accepts a block that maps elements to new key/value pairs.
✓		#update	Accepts multiple arguments.
✗	Kernel	#BigDecimal	Accepts a new optional keyword argument, :exception.
✓		#Complex	Accepts a new optional keyword argument, :exception.
✗		#exec	Does not close non-standard file descriptors.
✓		#Float	Accepts a new optional keyword argument, :exception.
✓		#Integer	Accepts a new optional keyword argument, :exception.
✓		#Rational	Accepts a new optional keyword argument, :exception.
✓		#then	New (alias of yield_self)
✗		#system	Accepts a new optional keyword argument, :exception. Does not close non-standard file descriptors.
✗	KeyError	.new	Accepts new optional keyword arguments, :receiver and :key.
✗	Matrix	#[]=	New
✗		#antisymmetric?	New
✗		#collect!	New
✗		#map!	New
✗		#skew_symmetric?	New
✗	Method	#<<	New
✗		#>>	New
✗	Module	#method_defined?	Accepts a second optional argument (default: true). If false, it only checks the class and not the ancestors.
✗		#private_method_defined?	Accepts a second optional argument (default: true). If false, it only checks the class and not the ancestors.
✗		#protected_method_defined?	Accepts a second optional argument (default: true). If false, it only checks the class and not the ancestors.
✗	NameError	.new	Accepts new optional keyword arguments, :receiver and :key.
✗	Net::HTTP	.new	Accepts a new optional keyword argument, :write_timeout.
✗		#write_timeout	New
✗		#write_timeout=	New
✗	NilClass	#=~	New
✗	NoMethodError	.new	Accepts new optional keyword arguments, :receiver and :key.
✗	Numeric	#step	Now returns an instance of the Enumerator::ArithmeticSequence class rather than one of the Enumerator class.
✓	OpenStruct	#to_h	Accepts a block that maps keys and values to new keys and values.
✗	Proc	#<<	New
✗		#>>	New
✗		.call	No longer changes $SAFE.
✗	Random	.bytes	New
✗	Range	#%	New
✗		#===	Now uses cover? instead of include?.
✗		#cover?	Accepts a Range.
✗		#step	Now returns an instance of the Enumerator::ArithmeticSequence class rather than one of the Enumerator class.
✗	RSS::Parser	.parse	Accepts options as a Hash. Options are :ignore_unknown_element, :parser_class, and :validate.
✗	Set	#filter!	New (alias of select!)
✓	String	#split	Yields each substring to a block if given.
✗	Struct	#filter	New (alias of select)
✓		#to_h	Accepts a block that maps keys and values to new keys and values.
✗	Time	#+	Preserves the timezone.
✗		#-	Preserves the timezone.
✗		.new	Accepts a timezone object as well as a UTC offset string.
✗		#getlocal	Accepts a timezone object as well as a UTC offset string.
✗		#succ	Preserves the timezone.
✗	TracePoint	#enable	Accepts new optional keyword arguments, :target and :target_line.
✗		#eval_script	New
✗		#instruction_sequence	New
✗		#parameters	New
✗	Vector	#[]=	New
✗		#collect!	New
✗		#map!	New

2.5

Attempting to modify frozen objects now throws FrozenError instead of RuntimeError. Methods where this change occurred are not listed below even though they have techically changed. FrozenError is a subclass of RuntimeError so it is safe to continue rescuing RuntimeError if needed.

	Object	Method	Changes
✓	Array	#append	New (alias for push)
✓		#prepend	New (alias for unshift)
✓	BigDecimal	#clone	Returns the receiver itself instead of making a new instance.
✓		#dup	Returns the receiver itself instead of making a new instance.
✓	Dir	.children	New
✓		.each_child	New
✗		#glob	Accepts a new optional keyword argument, :base.
✓	Enumerable	#all?	Accepts a pattern argument.
✓		#any?	Accepts a pattern argument.
✓		#none?	Accepts a pattern argument.
✓		#one?	Accepts a pattern argument.
✗	ERB	.result_with_hash	New
✗	Exception	#full_message	New
✗	File	.identical?	Support ReFS 128bit ino on Windows 8.1 and later.
✗		.lutime	New
✗		.open	Use of the optional argument newline now implies text mode.
✗		#path	Raises an IOError for files opened with File::Constants::TMPFILE option.
✗	File::Stat	#atime	Support fractional second timestamps on Windows 8 and later.
✗		#ctime	Support fractional second timestamps on Windows 8 and later.
✗		#ino	Support ReFS 128bit ino on Windows 8.1 and later.
✗		#mtime	Support fractional second timestamps on Windows 8 and later.
✓	Hash	#slice	New
✓		#transform_keys	New
✗		#transform_keys!	New
✓	Integer	#allbits?	New
✓		#anybits?	New
✓		#ceil	Always return an Integer.
✓		#floor	Always return an Integer.
✓		#nobits?	New
✗		#pow	Same as ** but it accepts an optional modulo argument for calculating modular exponentiation.
✓		#round	Always return an Integer.
✓		.sqrt	New
✓		#truncate	Always return an Integer.
✗	IO	#pread	New
✗		#pwrite	New
✗		#write	Accepts multiple arguments.
✗	IOError	#close	Instead of raising an error with the message "stream closed", the message will be "stream closed in another thread".
✗	IPAddr	#link_local?	New
✗		#loopback?	New
✗		.new	No longer accepts an invalid address mask.
✗		#prefix?	New
✗		#private?	New
✓	Kernel	#yield_self	New
✗		#pp	New
✗		#warn	Accepts a new optional keyword argument, :uplevel.
✗	KeyError	#key	New
✗		#receiver	New
✗	Matrix	.combine	New
✗		#combine	New
✗		#entrywise_product	New
✗		#hadamard_product	New
✗	Method	#===	New
✗	Module	#attr	Is now public.
✗		#attr_accessor	Is now public.
✗		#attr_reader	Is now public.
✗		#attr_writer	Is now public.
✗		#alias_method	Is now public.
✗		#define_method	Is now public.
✗		#remove_method	Is now public.
✗		#undef_method	Is now public.
✗	Net::HTTP	#max_version	New
✗		#min_version	New
✗		.new	Accepts a new optional keyword argument, :no_proxy.
✗		#proxy_pass	Reflects the http_proxy environment variable if the system's environment variable is multiuser safe.
✗		#proxy_user	Reflects the http_proxy environment variable if the system's environment variable is multiuser safe.
✗	Numeric	#<	No longer hide exceptions from #coerce and will return nil if coercion is impossible.
✗		#<=	No longer hide exceptions from #coerce and will return nil if coercion is impossible.
✗		#>	No longer hide exceptions from #coerce and will return nil if coercion is impossible.
✗		#>=	No longer hide exceptions from #coerce and will return nil if coercion is impossible.
✗		#step	No longer hides errors from coerce method when given a step value which cannot be compared with #> to 0.
✗	Pathname	#glob	New
✗	Process	.last_status	New (alias of $?)
✗		.times	Precision is improved if getrusage(2) exists.
✗	Range	.initialize	No longer hides exceptions when comparing begin and end with <=> and raise a "bad value for range" ArgumentError but instead lets the exception from the <=> call go through.
✗	Random	#urandom	Renamed from raw_seed.
✗	SecureRandom	.alphanumeric	New
✓	Set	#===	New (alias of include?)
✗		#reset	New
✓		#to_s	New (alias of inspect)
✓	String	#casecmp	Returns nil for non-string arguments instead of raising a TypeError.
✓		#casecmp?	Returns nil for non-string arguments instead of raising a TypeError.
✓		#delete_prefix	New
P		#delete_prefix!	New Differences: Throws RuntimeError instead of FrozenError when attempting to modify a frozen string.
✓		#delete_suffix	New (alias of chomp)
P		#delete_suffix!	New (alias of chomp!) Differences: Throws RuntimeError instead of FrozenError when attempting to modify a frozen string.
✓		#each_grapheme_cluster	New
✓		#grapheme_clusters	New
P		#start_with?	Accepts regular expression arguments. Differences: Does not set Regexp globals.
✗		#undump	New
✗	StringIO	#write	Accepts multiple arguments.
✗	StringScanner	#captures	New
✗		#size	New
✗		#values_at	New
✓	Struct	.new	Accepts a new optional keyword argument, :keyword_init.
✗	Thread	#fetch	New
✗		#name=	Description set by Thread#name= is now visible on Windows 10.
✓	Time	.at	Accepts a third argument which specifies the unit of the second argument.
✗	URI	.open	New (alias of Kernel.open)
✗	Zlib::GzipWriter	#write	Accepts multiple arguments.

2.4

	Object	Method	Changes
✓	Array	#concat	Accepts multiple arguments.
✗		#max	This method already existed but was inherited from Enumerable. It was optimized on Array so redefining Enumerable#max no longer affects this.
✗		#min	This method already existed but was inherited from Enumerable. It was optimized on Array so redefining Enumerable#min no longer affects this.
✗		#pack	Accepts a new optional keyword argument, buffer.
✓		#sum	Like Enumerable#sum but does not depend on the definition of each.
✗	BasicObject	#__send__	Supports refined methods.
✗	Binding	#irb	Start a REPL session like binding.pry.
✓	Comparable	#clamp	New
✗	CSV	#new	Accepts a new optional keyword argument, liberal_parsing.
✓	Dir	.empty?	New
✓	Enumerable	#chunk	Calling without a block returns an enumerator.
✓		#sum	New
✓		#uniq	New
✓	Enumerator::Lazy	#chunk_while	New
✓		#uniq	New
✓	File	.empty?	New (alias of zero?)
✗	FileTest	.empty?	New (alias of zero?)
✓	Float	#ceil	Accepts an optional digits argument.
✓		#floor	Accepts an optional digits argument.
✗		#round	Accepts an optional digits argument and provides a new optional keyword argument, half.
✓		#truncate	Accepts an optional digits argument.
✓	Hash	#compact	New
✓		#compact!	New
✓		#transform_values	New
✓		#transform_values!	New
✓	Integer	#ceil	Accepts an optional digits argument.
✓		#digits	New
✓		#floor	Accepts an optional digits argument.
✓		#round	Accepts an optional digits argument and provides a new optional keyword argument, half.
✓		#truncate	Accepts an optional digits argument.
✓	IO	#each_line	Accepts a new optional keyword argument, chomp.
✓		.foreach	Accepts a new optional keyword argument, chomp.
✓		#gets	Accepts a new optional keyword argument, chomp.
✓		#lines	Accepts a new optional keyword argument, chomp.
✓		#readline	Accepts a new optional keyword argument, chomp.
✓		#readlines	Accepts a new optional keyword argument, chomp.
✓		.readlines	Accepts a new optional keyword argument, chomp.
✓	IPAddr	#==	No longer raises an exception if coercion fails.
✓		#<=>	No longer raises an exception if coercion fails.
✗	Kernel	#send	Supports refined methods.
✗	Logger	#new	Allow specifying logger parameters in constructor such as level, progname, datetime_format, formatter. Add shift_period_suffix option.
✓	MatchData	#named_captures	New
✓		#values_at	Supports named captures.
✗	Module	#refine	Accepts a module as an argument.
✗		.used_modules	New
✗	Net::HTTP	#post	New
✗	Net::FTP	#new	Supports hash style options.
✗		#status	Accepts a new optional keyword argument, pathname.
✓	Numeric	#clone	Returns self instead of raising an error.
✓		#dup	Returns self instead of raising an error.
✓		#finite?	New
✓		#infinite?	New
✓	Object	#clone	Accepts a new optional keyword argument, freeze.
✗	OptionParser	#order	Accepts a new optional keyword argument, into.
✗		#order!	Accepts a new optional keyword argument, into.
✗		#parse	Accepts a new optional keyword argument, into.
✗		#parse!	Accepts a new optional keyword argument, into.
✗		#permute	Accepts a new optional keyword argument, into.
✗		#permute!	Accepts a new optional keyword argument, into.
✓	Pathname	#empty?	New
✗	Readline	#quoting_detection_proc	New
✗		#quoting_detection_proc=	New
✗	REXML::Element	#[]	If String or Symbol is specified, attribute value is returned. Otherwise, Nth child is returned.
✗	Rational	#round	Accepts a new optional keyword argument, half.
✓	Regexp	#match?	New
✗	Set	#compare_by_identity	New
✗		#compare_by_identity?	New
✗	String	#capitalize	Supports Unicode and accepts several new keyword arguments.
✗		#capitalize!	Supports Unicode and accepts several new keyword arguments.
P		#casecmp?	New Differences: Does not support Unicode characters.
✓		#concat	Now accepts multiple arguments.
✗		#downcase	Supports Unicode and accepts several new keyword arguments.
✗		#downcase!	Supports Unicode and accepts several new keyword arguments.
✓		#each_line	Accepts a new optional keyword argument, chomp.
✓		#lines	Accepts a new optional keyword argument, chomp.
✓		#match?	New
P		.new	Accepts a new optional keyword argument, capacity. Differences: Allows :capacity option to pass but does nothing with it.
✓		#prepend	Now accepts multiple arguments.
✗		#swapcase	Supports Unicode and accepts several new keyword arguments.
✗		#swapcase!	Supports Unicode and accepts several new keyword arguments.
✓		#unpack1	New
✗		#upcase	Supports Unicode and accepts several new keyword arguments.
✗		#upcase!	Supports Unicode and accepts several new keyword arguments.
✓	StringIO	#each_line	Accepts a new optional keyword argument, chomp.
✓		#gets	Accepts a new optional keyword argument, chomp.
✓		#readline	Accepts a new optional keyword argument, chomp.
✓		#readlines	Accepts a new optional keyword argument, chomp.
✗	Symbol	#capitalize	Supports Unicode and accepts several new keyword arguments.
✗		#capitalize!	Supports Unicode and accepts several new keyword arguments.
P		#casecmp?	New Differences: Does not support Unicode characters.
✗		#downcase	Supports Unicode and accepts several new keyword arguments.
✗		#downcase!	Supports Unicode and accepts several new keyword arguments.
✓		#match	Now returns MatchData instead of match position.
✓		#match?	New
✗		#swapcase	Supports Unicode and accepts several new keyword arguments.
✗		#swapcase!	Supports Unicode and accepts several new keyword arguments.
✗		#to_proc	Supports refinements.
✗		#upcase	Supports Unicode and accepts several new keyword arguments.
✗		#upcase!	Supports Unicode and accepts several new keyword arguments.
✗	Thread	#report_on_exception	New
✗		#report_on_exception=	New
✗		.report_on_exception	New
✗		.report_on_exception=	New
✗	TracePoint	#callee_id	New
✗	Warning	#warn	New

2.3

	Object	Method	Changes
✗	ARGF	#read_nonblock	Accepts a new optional keyword argument, exception.
✓	Array	#bsearch_index	New
✓		#dig	New
✗		#flatten	No longer calls to_ary on elements beyond the given level.
✗		#flatten!	No longer calls to_ary on elements beyond the given level.
✗		#inspect	No longer raises an error if its content returns a string which is not compatible with Encoding.default_external.
✗		#pack	Add j and J directives for pointer width integer type.
✗	Base64	.urlsafe_encode64	Accepts a new optional keyword argument, padding.
✗		.urlsafe_decode64	Accepts a new optional keyword argument, padding.
✗	BasicSocket	#recv	Allow an output String buffer argument.
✗		#recv_nonblock	Allow an output String buffer argument.
✗		#recvmsg_nonblock	Accepts a new keyword argument, exception.
✗		#sendmsg_nonblock	Accepts a new keyword argument, exception.
✗	Comparable	#==	No longer rescues exceptions.
✗	Coverage	.peek_result	New
✗	Enumerable	#chunk	No longer accepts the initial_state keyword argument.
✓		#chunk_while	New
✓		#grep_v	New
✓		#slice_before	No longer accepts the initial_state keyword argument.
✓	Enumerator::Lazy	#grep_v	New
✗	File	.mkfifo	New
✗	File::Stat	#ino	On Windows, it always returned 0, but now returns BY_HANDLE_FILE_INFORMATION.nFileIndexHigh/Low.
✓	Hash	#<	New
✓		#<=	New
✓		#>	New
✓		#>=	New
✓		#dig	New
✓		#fetch_values	New
✗		#inspect	No longer raises an error if its content returns a string which is not compatible with Encoding.default_external.
P		#to_proc	New Differences: Works in every respect but returns a lambda instead of a proc. Returning a proc may be an error in MRI's implementation. See: https://bugs.ruby-lang.org/issues/12671)
✗	IO	#advise	No longer raises Errno::ENOSYS in cases where it was detected at build time but not available at runtime.
✗		#close	Doesn't raise when the IO object is closed.
✗		#each_codepoint	Raises an exception at incomplete character before EOF when conversion takes place.
✗		#wait_readable	No longer checks FIONREAD.
✓	Kernel	#loop	When stopped by a StopIteration exception, returns what the enumerator has returned instead of nil.
✗	Logger	#level=	New
✗		#reopen	New
✗	Module	#define_method	Now requires a method body, Proc, Method, or a block.
✗		#deprecate_constant	New
✗	NameError	#receiver	New
✗	Net::FTP	.default_passive=	New
✗		#mlst	New
✗		#mlsd	New
✗	Net::HTTP	#open_timeout	Now has a default value of 60.
✓	Numeric	#negative?	New
✓		#positive?	New
✗	Object	#define_singleton_method	Now requires a method body, Proc, Method, or a block.
✗	ObjectSpace	.count_symbols	New
✗		.count_imemo_objects	New
✗		.internal_class_of	New
✗		.internal_super_of	New
✗	OpenSSL::SSL::SSLSocket	#accept_nonblock	Accepts a new keyword argument, exception.
✗		#connect_nonblock	Accepts a new keyword argument, exception.
✗	Pathname	#ascend	Returns an enumerator if no block is given.
✗		#descend	Returns an enumerator if no block is given.
✓	Prime	.prime?	ArgumentError message says that an integer is expected instead of it being a comparison error.
✗	Queue	#close	New
✗	Socket	#accept_nonblock	Accepts a new keyword argument, exception.
✗		#connect_nonblock	Accepts a new keyword argument, exception.
✓	String	#+@	New
✓		#-@	New
✓		.new	Accepts a new keyword argument, encoding.
✗		#unpack	Add j and J directives for pointer width integer type.
✗	StringIO	#set_encoding	No longer sets the encoding of its buffer string.
✓	Struct	#dig	New
✗	TCPServer	#accept_nonblock	Accepts a new keyword argument, exception.
✗	Thread	#name	New
✗		#name=	New
✗	UNIXServer	#accept_nonblock	Accepts a new keyword argument, exception.
✗	Vector	#round	New

2.2

	Object	Method	Changes
✗	Binding	#local_variables	New
✗		#receiver	New
✗	Dir	#fileno	New
✓	Enumerable	#max	Accepts a new optional argument to return multiple elements.
✓		#max_by	Accepts a new optional argument to return multiple elements.
✓		#min	Accepts a new optional argument to return multiple elements.
✓		#min_by	Accepts a new optional argument to return multiple elements.
✓		#slice_after	New
✓		#slice_when	New
✗	Etc	.confstr	New
✗		.sysconf	New
✗		.nprocessors	New
✗		.uname	New
✗	Float	#next_float	New
✗		#prev_float	New
✗	File	.birthtime	New
✗		#birthtime	New
✗	File::Stat	#birthtime	New
✗	Find	.find	Accepts a new optional keyword argument, ignore_error.
✗	GC	.latest_gc_info	Returns :state to represent current GC status.
✗		.stat	Some keys were renamed and new keys were added.
✗	IO	#each_codepoint	Raises an exception at incomplete character before EOF when conversion takes place.
✗		#nonblock_read	Supports pipes on Windows.
✗		#nonblock_write	Supports pipes on Windows.
✗		#pathconf	New
✓	Kernel	#itself	New
✗		#throw	Raises UncaughtThrowError, subclass of ArgumentError when there is no corresponding catch block, instead of ArgumentError.
✗	Math	.atan2	Now returns values like as expected by C99 if both two arguments are infinity.
✓		.log	Now raises Math::DomainError instead of returning NaN if the base is less than 0, and returns NaN instead of -infinity if both of two arguments are 0.
✗	Matrix	#+@	New
✗		#-@	New
✗		#adjugate	New
✗		#cofactor	New
✗		#first_minor	New
✗		.hstack	New
✗		#hstack	New
✗		#laplace_expansion	New
✗		.vstack	New
✗		#vstack	New
✗	Method	#curry	New
✗		#super_method	New
✗	ObjectSpace	.memsize_of	Returns a size including sizeof(RVALUE).
✗	Pathname	#/	New (alias of #+)
✗		#birthtime	New
✗		#find	Accepts a new optional keyword argument, ignore_error.
✓	Prime	.prime?	Now returns false for negative numbers.
✗	Process	.spawn	Opens the file in write mode for redirect from [:out, :err].
✗	String	#unicode_normalize	New
✗		#unicode_normalize!	New
✗		#unicode_normalized?	New
✗	Time	.httpdate	Always produces a UTC Time object.
✗		.parse	May produce fixed-offset Time objects.
✗		.rfc2822	May produce fixed-offset Time objects.
✗		.strptime	May produce fixed-offset Time objects. Raises ArgumentError when there is no date information.
✗		.xmlschema	May produce fixed-offset Time objects.
✗	TSort	.each_strongly_connected_component	Returns an enumerator if no block is given.
✗		.each_strongly_connected_component_from	Returns an enumerator if no block is given.
✗		.tsort_each	Returns an enumerator if no block is given.
✓	Vector	#+@	New
✗		#-@	New
✗		#angle_with	New
✗		.basis	New
✗		#cross	New (alias of #cross_product)
✗		#cross_product	New
✗		#dot	New (alias of #inner_product)
✗		.independent?	New
✗		#independent?	New

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/AaronLasseigne/polyfill. Please read the contributing file prior to pull requests.

Credits

Polyfill is licensed under the MIT License.