Perl 6 is a new language.
Err. No. Perl 6 is a new version of the same language: Perl.
Just as Perl 5 was. Just as Perl 4 was.
Most of this cheat sheet does not apply to Perl 6.
Au contraire! The vast majority of it is unchanged for Perl 6. See my other node on this topic.
Heck, most of Perl as we know it does not apply to Perl 6.
Just not true. My guess is that about 80% of your existing Perl knowledge will map usefully over to Perl 6.
I think the difference between Perl 5 and 6 will much greater than the difference between C and C++ :)
I very much doubt it. More like the difference between pre-ANSI C++ and post-ANSI C++.
Except, of course, that Perl 6 won't suck. ;-)
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