What are the most interesting / useful things in Perl 5.12?

Question

I remember how quickly adapted given .. when, say, //, and the operator smart matching, when there was a Perl 5.10.

What do you think are the most useful fixes and features introduced in Perl 5.12.0?

Answer 1

This is my favorite feature:

use 5.012; # enables 'use strict' implicitly!

Answer 2

Initial data:

• full changelog

• Incompatibility Changes

Interesting:

• Modes are now second to none
• Included Keywords
• New syntax allows developers to specify package version numbers directly in package statements
• Perl now warns the user about using obsolete default functions.

Miraculous:

, - , perlperf - Perl Performance and Optimization Techniques !!!

:

• DTRACE ()!
• \N
• ... (aka Yada Yada)
• Y2038 Compliance - Perl "Y2038" .

Answer 3

while( readdir $dir ){} , while( readline $file ){}.

perl -MO=Deparse -e'while( readline $f ){}'

while (defined($_ = <$f>)) {
    ();
}

_{<$f> readline $f}

---

Perl v5.11.2 while( readdir $dir ){}

perl-5.10 -MO=Deparse -e'while( readdir $d ){}'

while (readdir $d) {
    ();
}

, , 0. , .

---

5.11.2 Perl , while( readline $file ){...}.

perl-5.12.0 -MO=Deparse -e'while( readdir $d ){}'

while (defined($_ = readdir $d)) {
    ();
}

---

, I , . , - Perl. , , Perl.

Answer 4

Yada Yada, , .

Answer 5

, , Perl- Portable (-) ( ).

Perl 64- Windows GCC, 64- Strawberry Perl.