Documentation Development Beat

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= Perl =
 
== Perl updated to 5.16 ==
 
Perl 5.16 introduces a number of significant changes:
 
  
=== New Features ===
 
* Unicode 6.1
 
* More consistent ''eval'' controlled with ''unicode_eval'' and ''evalbytes'' feature
 
* 2- and 3-argument ''substr'' called in left-value context is evaluted even after changing original string
 
* New ''T_*REF_REFCOUNT_FIXED'' XS typemap fixing reference counter decremetion
 
* New ''is_utf8_char_buf'' XS-callable function replaces broken ''is_utf8_char'' function
 
* ''$$'' variable is writable
 
* Improved debugger: tracing mode can be restricted to certain level, breakpoints can be disabled temporarily, breakpoints can be set by file name
 
* ''sort'' subroutines can be autoloaded
 
* ''$['' variable is provided by ''arybase'' module
 
* mmaped PerlIO layer is now a separate module ''PerlIO::mmap''
 
 
=== Deprecated Features ===
 
* Accessing Unicode database files directly is deprecated now; use ''Unicode::UCD'' instead
 
* ''Version::Requirements'' is deprecated in favor of ''CPAN::Meta::Requirements''
 
 
=== Incompatible Changes ===
 
* Special blocks (e.g. ''BEGIN'') are called in void context
 
* Unoverloaded stringification of regular expression does not return the expression literal
 
* ''T_DATAUNIT'' and ''T_CALLBACK'' XS typemaps removed
 
* User defined case-changing has been removed in favor of ''Unicode::Casing''
 
* XSUB C functions are static now and they are not exported from their object files
 
* Read-only references cannot be weaken
 
* ''$$'',  ''$<'', ''$>'', ''$('', and ''$)'' do not cache their value
 
* ''Devel::DProf'', ''Shell'' have been removed from Perl core
 
* perl4 libraries removed: abbrev.pl, assert.pl, bigfloat.pl, bigint.pl, bigrat.pl, cacheout.pl, complete.pl, ctime.pl, dotsh.pl, exceptions.pl, fastcwd.pl, flush.pl, getcwd.pl, getopt.pl, getopts.pl, hostname.pl, importenv.pl, lib/find{,depth}.pl, look.pl, newgetopt.pl, open2.pl, open3.pl, pwd.pl, hellwords.pl, stat.pl, tainted.pl, termcap.pl, timelocal.pl
 
 
= Python updated to 3.3 =
 
The system Python 3 stack has been upgraded to 3.3 (the system Python 2 stack remains at 2.7), bringing in hundreds of fixes and tweaks; for a list of changes see http://docs.python.org/dev/whatsnew/3.3.html
 
 
= Ruby stack updated =
 
Fedora 18 will provide Rails 3.2, the latest version of the Rails stack. Developers are able to use the latest Rails features, which are documented in the project's release notes:
 
http://guides.rubyonrails.org/3_2_release_notes.html
 
http://guides.rubyonrails.org/3_1_release_notes.html
 
 
= Clojure joined by leiningen and tools =
 
Fedora 18 now ships a more complete Clojure programming stack, including the build tool Leiningen. This will make it easier to package other Clojure libraries in the future.
 
  
 
[[Category:Docs Project]]
 
[[Category:Docs Project]]
 
[[Category:Draft documentation]]
 
[[Category:Draft documentation]]
 
[[Category:Documentation beats]]
 
[[Category:Documentation beats]]

Revision as of 06:25, 19 July 2013

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