Re^2: How to combine two different hashes into single hash.

Running your code I get "Can't use an undefined value as a HASH reference" (update: using warnings )

... and Perl exits "compilation exited abnormally with code 255 at Sun Dec 29 00:36:58" (update: using strict )

That's why I had to add the // {} parts in my code to default to an empty hash.

Did you tweak your Perl?

my version: This is perl 5, version 24, subversion 1 (v5.24.1) built for MSWin32-x64-multi-thread

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery
FootballPerl is like chess, only without the dice}

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Re^3: How to combine two different hashes into single hash. by tobyink (Canon) on Dec 29, 2019 at 00:56 UTC
It'll do that with `use strict`. You could do this: `my %output; $output{$_} \|\|= {( %{$VAR1->{$_}\|\|{}}, %{$VAR2->{$_}\|\|{}} )} for keys(%$VAR1), keys(%$VAR2);` [download] Not really any need to use the `//` operator which limits backwards compatibility. (Introduced in Perl 5.10.) toby döt ink	[reply] [d/l] [select]