This document is a list of user-visible feature changes since the 3.1.0 release, except for bug fixes.
Note that each entry is kept to a minimum, see links for details.
-
Anonymous rest and keyword rest arguments can now be passed as arguments, instead of just used in method parameters. [Feature #18351]
def foo(*) bar(*) end def baz(**) quux(**) end
-
Constant assignment evaluation order for constants set on explicit objects has been made consistent with single attribute assignment evaluation order. With this code:
foo::BAR = baz
foo
is now called beforebaz
. Similarly, for multiple assignment to constants, left-to-right evaluation order is used. With this code:foo1::BAR1, foo2::BAR2 = baz1, baz2
The following evaluation order is now used:
foo1
foo2
baz1
baz2
Note: We're only listing outstanding class updates.
-
Hash
- Hash#shift now always returns nil if the hash is empty, instead of returning the default value or calling the default proc. [Bug #16908]
-
Module
- Module.used_refinements has been added. [Feature #14332]
- Module#refinements has been added. [Feature #12737]
- Module#const_added has been added. [[Feature #17881]]
-
Proc
- Proc#dup returns an instance of subclass. [Bug #17545]
-
Refinement
- Refinement#refined_class has been added. [Feature #12737]
- The following default gem are updated.
- RubyGems 3.4.0.dev
- bundler 2.4.0.dev
- etc 1.4.0
- io-console 0.5.11
- reline 0.3.1
- The following bundled gems are updated.
- net-imap 0.2.3
- typeprof 0.21.2
- The following default gems are now bundled gems.
Note: Excluding feature bug fixes.
The following deprecated constants are removed.
Random::DEFAULT
[Feature #17351]Struct::Group
Struct::Passwd
The following deprecated methods are removed.
Dir.exists?
[Feature #17391]File.exists?
[Feature #17391]Kernel#=~
[Feature #15231]Kernel#taint
,Kernel#untaint
,Kernel#tainted?
[Feature #16131]Kernel#trust
,Kernel#untrust
,Kernel#untrusted?
[Feature #16131]
- ERB
ERB.new
no longer takes more than one positional arguments [Feature #14256]
The following deprecated APIs are removed.
rb_cData
variable.- "taintedness" and "trustedness" functions. [Feature #16131]