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One method is to use recursion in combination with dispatch tables:

use strict; use warnings; my %dispatch = ( # scalar '' => sub { my ( $element, $op ) = @_; $op->( $element ); }, 'HASH' => sub { my ( $element, $op ) = @_; for my $key (keys %{$element}) { search_and_replace_in_hash( $element->{$key}, $op ); } }, 'ARRAY' => sub { my ( $element, $op ) = @_; search_and_replace_in_hash( $_, $op) for @{$element}; }, 'default' => sub { my ( $element, $op ) = @_; print STDERR ref($element).": unknown type of reference\ +n" }, ); # operates on references sub search_and_replace_in_hash { &{ $dispatch{ ref($_[0]) } // $dispatch{'default'} }(@_); } my $var = { "0x55555555" => { "0x55555555" => [ ["0xAAAAAAAA", "0x9"], + ], "0xAAAAAAAA" => [ ["0xAAAAAAAA", "0x8"], ], }, "0xAAAAAAAA" => { "0x55555555" => [ ["0xFFFFFFFF", "0x8"], ], "0xAAAAAAAA" => [ ["0x55555554", "0x3"], ], }, }; search_and_replace_in_hash( $var, sub { $_ =~ s/0x//; } ); search_and_replace_in_hash( $var, sub { print "$_\n"; } ); # no need f +or Data::Dumper

For other types of references, you need to expand the dispatch table accordingly.

Thanks to Rolf for his helpful comments above.


In reply to Re: Manipulate deepest values in complex hash structures by hdb
in thread Manipulate deepest values in complex hash structures by RecursionBane

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    [karlgoethebier]: marioroy: Racket ball is considered harmful, like Squash
    [marioroy]: Wait till folks see what MCE::Hobo can do in the upcoming release. Multiple instances, nested spawning, 3 levels, doesn't matter. it works on Windiows too.
    [Lady_Aleena]: I hate sites that tell me to turn ad-blocker off. They should know better.
    [marioroy]: s/Windiows/ Windows/
    [Discipulus]: marioroy can you expand that Niagara's fall history?
    erix only sees fallen angels
    erix if it weren't for bad luck, I'd have no luck at all
    Discipulus Windiows the OS of native americans..
    [karlgoethebier]: marioroy: Next step: Write the ultimate book. "Parallel Programming With Perl. Yet Another Missing Manual" ;-)
    [marioroy]: karlgoethebier I do not do Racket ball anymore. That was from gym class long ago.

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