Hash::Diff::Dispatch Hash::Diff::Dispatch allows to execute code depending on difference between hashes.
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Hash::Diff::Dispatch Tags

Perl module hash diff hash diff execute code dispach

Hash::Diff::Dispatch Description

Hash::Diff::Dispatch allows to execute code depending on difference between hashes. Hash::Diff::Dispatch allows to execute code depending on difference between hashes.SYNOPSIS my $hash_watcher = Hash::Diff::Dispatch->new( {}, # Sets the starting hash # The events will be called using the order returned # by calling 'keys' on these values... 'b' => &bold, 'i' => &italic, ); # Will call: bold('on', 5) $hash_watcher->update( { b => 5, a => 'la' } ); # Will call: bold('changed', 6) $hash_watcher->update( { b => 6 } ); # Will call: bold('changed', 0) $hash_watcher->update( { b => 0 } ); # Will call: bold('off') $hash_watcher->update( {} );METHODSnewAccepts a starting hash-ref, and then a list of keys you want to watch, and the code to execute when they change. It will take a copy of the hash in the hash-ref you specify.updateAccepts a hash-ref, which it'll take a copy of, and make it the 'saved' hash to check the next call to update again.If a key's value has changed, it'll execute the code specified when you created the object. If the key exists where it didn't before, it'll pass 'on' as the first argument, and the new value as the second. If it's changed, 'changed' and the new value. If it's been deleted, it'll pass 'off'. Requirements: · Perl

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