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= Perl =
== Perl updated to 5.16 ==
Perl 5.16 introduces a number of significant changes:


=== New Features ===
== Perl 5.24 ==
* Unicode 6.1
Perl has been updated to the latest stable version, 5.24, for Fedora 25.  Changes include:
* 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 ===
{{:Changes/perl5.24}}
* Accessing Unicode database files directly is deprecated now; use ''Unicode::UCD'' instead
* ''Version::Requirements'' is deprecated in favor of ''CPAN::Meta::Requirements''


=== Incompatible Changes ===
== Node.js 6.x ==
* Special blocks (e.g. ''BEGIN'') are called in void context
Fedora 25 offers Node.js 6.x, the latest LTS release of the platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.  
* 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 =
This replaces the older Node.js 4.x libraries found in legacy Fedora releases. Users of Node.js applications should notice no problems from this change, although developers should review the upstream release notes and API changes:
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
 
* [http://blog.nodejs.org Upstream release announcements]
* [https://github.com/nodejs/node/wiki/Breaking-changes-between-v4-and-v5 API changes in 5.x]
* [https://github.com/nodejs/node/wiki/Breaking-changes-between-v5-and-v6 API changes in 6.x]


= 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]]
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[[Category:Draft documentation]]
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[[Category:Documentation beats]]
[[Category:Documentation beats]]

Latest revision as of 01:32, 20 September 2016

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Perl 5.24

Perl has been updated to the latest stable version, 5.24, for Fedora 25. Changes include:


  • New features:
    • Unicode 8.0 is now supported.
    • An exception will be raised when closing an in-place output file fails.
    • (?[ ]) will successfully compile when use locale is in effect.
    • Integer shift (<< and >>) now more explicitly defined. Negative shifts are reverse shifts.
    • printf and sprintf now allow reordered precision arguments.
    • When passing the SA_SIGINFO flag to sigaction, the errno, status, uid, pid, addr and band fields are included in the hash passed to the handler, if supported by the platform.
    • Hashbang redirection was extended also to Perl 6.
  • Changes:
    • Postfix dereferencing is no longer experimental.
    • Remove duplicate environment variables from environ.
    • More regular expression patterns are now checked for validity at compilation time, and invalid ones will cause the program to not compile.
    • Using \N{} is a fatal error under experimental feature "'strict' mode" in re.
    • A my, our, or state declaration is no longer allowed inside of another my, our, or state declaration.
    • The /\C/ character class has been removed.
    • Using chdir(\'\') or chdir(undef) to change working directory to a home directory fails now. Use chdir() instead.
    • ASCII characters in variable names must now be all visible.
    • $Carp::MaxArgNums is supposed to be the number of arguments to display.
    • Only blanks and tabs are now allowed within [...] within (?[...]).
    • Matching fixed string regular expression is now faster in most cases.
  • Removed features:
    • The autoderef feature has been removed.
    • Lexical $_ has been removed.
    • PPPort.so no longer get installed, as they are not used by PPPort.pm.
    • Using code points above the platform's IV_MAX is now deprecated.
    • Bitwise operations on strings containing code points above 0xFF is deprecated. Instead, encode these strings to byte strings first.
    • sysread(), syswrite(), recv() and send() are deprecated on :utf8 handles.


Node.js 6.x

Fedora 25 offers Node.js 6.x, the latest LTS release of the platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.

This replaces the older Node.js 4.x libraries found in legacy Fedora releases. Users of Node.js applications should notice no problems from this change, although developers should review the upstream release notes and API changes:

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