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127 lines
4.6 KiB
Text
127 lines
4.6 KiB
Text
# -*- rdoc -*-
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= NEWS for Ruby 2.2.0
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This document is a list of user visible feature changes made between
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releases except for bug fixes.
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Note that each entry is kept so brief that no reason behind or
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reference information is supplied with. For a full list of changes
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with all sufficient information, see the ChangeLog file.
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== Changes since the 2.1.0 release
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=== Language changes
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=== Core classes updates (outstanding ones only)
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* Enumerable
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* Extended methods:
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* min, min_by, max and max_by supports optional argument to return
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multiple elements.
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* File
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* new class File::Statfs to hold filesystem information. (experimental)
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* IO
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* New methods
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* IO#statfs returns filesystem information as File::Statfs. (experimental)
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* Symbol
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* New methods
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* Symbol.find(str) returns whether given string is defined as symbol or not.
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* Improvements
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* Most symbols which are returned by String#to_sym and
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String#intern are GC-able.
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* Matrix
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* New methods:
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* Matrix#first_minor(row, column) returns the submatrix obtained
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by deleting the specified row and column.
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* Matrix#cofactor(row, column) returns the (row, column) cofactor
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which is obtained by multiplying the first minor by (-1)**(row + column).
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=== Core classes compatibility issues (excluding feature bug fixes)
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* IO
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* incompatible changes:
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* When flushing file IO, you cannot assume that the metadata of the file
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is updated immediately. On some platforms (especially Windows), it is
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delayed until the filesystem load is decreased.
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* Proc
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* incompatible changes:
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* ArgumentError is no longer raised when lambda Proc is passed as a
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block, and the number of yielded arguments does not match the formal
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arguments of the lambda, if just an array is yielded and its length
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matches.
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=== Stdlib updates (outstanding ones only)
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* Find, Pathname
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* Extended methods:
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* find method accepts "ignore_error" keyword argument.
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=== Stdlib compatibility issues (excluding feature bug fixes)
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=== Built-in global variables compatibility issues
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=== C API updates
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* Deprecated APIs removed. [Feature #9502]
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Check_SafeStr -> SafeStringValue
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rb_check_safe_str -> SafeStringValue
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rb_quad_pack -> rb_integer_pack
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rb_quad_unpack -> rb_integer_unpack
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rb_read_check : access struct FILE internal. no replacement.
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rb_struct_iv_get : internal function. no replacement.
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struct rb_blocking_region_buffer : internal type. no replacement.
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rb_thread_blocking_region_begin -> rb_thread_call_without_gvl family
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rb_thread_blocking_region_end -> rb_thread_call_without_gvl family
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TRAP_BEG -> rb_thread_call_without_gvl family
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TRAP_END -> rb_thread_call_without_gvl family
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rb_thread_select -> rb_thread_fd_select
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struct rb_exec_arg : internal type. no replacement.
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rb_exec : internal function. no replacement.
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rb_exec_arg_addopt : internal function. no replacement.
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rb_exec_arg_fixup : internal function. no replacement.
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rb_exec_arg_init : internal function. no replacement.
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rb_exec_err : internal function. no replacement.
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rb_fork : internal function. no replacement.
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rb_fork_err : internal function. no replacement.
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rb_proc_exec_n : internal function. no replacement.
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rb_run_exec_options : internal function. no replacement.
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rb_run_exec_options_err : internal function. no replacement.
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rb_thread_blocking_region -> rb_thread_call_without_gvl family
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rb_thread_polling -> rb_thread_wait_for
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rb_big2str0 : internal function. no replacement.
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rb_big2ulong_pack -> rb_integer_pack
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rb_gc_set_params : internal function. no replacement.
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* struct RBignum is hidden. [Feature #6083]
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Use rb_integer_pack and rb_integer_unpack instead.
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* rb_big_new and rb_big_resize takes a size_t instead of long.
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* rb_num2long returns a long instead of SIGNED_VALUE.
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* rb_num2ulong returns an unsigned long instead of VALUE.
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* st hash table uses power-of-two sizes for speed [Feature #9425].
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Lookups are 10-25% faster if using appropriate hash functions.
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However, weaknesses in hash distribution can no longer be masked
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by prime number-sized tables, so extensions may need to tweak
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hash functions to ensure good distribution.
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* rb_sym2str() added. This is almost same as `rb_id2str(SYM2ID(sym))`
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but not pinning a dynamic symbol.
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* struct RSymbol added. This represents a dynamic symbol as object in
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Ruby's heaps.
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* rb_str_cat_cstr() added. This is same as `rb_str_cat2()`.
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* `rb_str_substr()` and `rb_str_subseq()` now share middle of a string,
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but not only the end of a string. Therefore, result strings may not
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be NUL-terminated, `StringValueCStr()` is needed calling to obtain a
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NUL-terminated C string.
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