@parkcg ... but the first stable release of Perl6 is at 2015 , and I like it

sub foo($a) { } // accept any type

sub foo(Str $a) { } // type constraint, will do static type checking

sub foo($a where { * ~~ Int | Str }) { } // type constraint block

@parkcg Perl6 ? gradual typing system

Ha ?!

It already told you `mv` is invalid command .

Absolutely it will!!
and virtual desktop is another good solution.

@h4lbhg1G I faced same trouble long time before, everything is fine after uninstall the `QQ PC M`

XZ1 Compact +1 :)

Who care.

I received same message too!!

BTW: Fuck Fuck KuQi !!!!!

Welcome to j**ascript community.

Reboot is just a symlink to systemctl .

Awesome! Mark!!

I setup a new VM for QQ :)

@julyclyde
But sometimes its not worth create a class.
Use Closures is easy and convenient.

@xpresslink The key point is not `how to implement a generator`.