maybe better readable with a custom function in case of deeply nested HoHoH...
DB<132> sub cycle { $_[1]++; $_[1] %= $_[0] }
DB<133> cycle 3 => $h{a}{b}[2]{c}; \%h
=> { a => { b => [undef, undef, { c => 1 }] } }
DB<134> cycle 3 => $h{a}{b}[2]{c}; \%h
=> { a => { b => [undef, undef, { c => 2 }] } }
DB<135> cycle 3 => $h{a}{b}[2]{c}; \%h
=> { a => { b => [undef, undef, { c => 0 }] } }
unfortunately does Perl have no autoboxing, to allow:
$h{a}{b}[2]{c}->cycle(3)
edit
Ha, it can be emulated with ano-subs! =)
DB<160> $cycle = sub { $_[0]++; $_[0] %= $_[1] }
=> sub { "???" }
DB<161> $h{a}{b}[2]{c}->$cycle(3); \%h
=> { a => { b => [undef, undef, { c => 1 }] } }
DB<162> $h{a}{b}[2]{c}->$cycle(3); \%h
=> { a => { b => [undef, undef, { c => 2 }] } }
DB<163> $h{a}{b}[2]{c}->$cycle(3); \%h
=> { a => { b => [undef, undef, { c => 0 }] } }
Cheers Rolf
( addicted to the Perl Programming Language)
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