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Answer: How do I take a slice of a hash reference?

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Q&A > references > How do I take a slice of a hash reference? - Answer contributed by tianping

japhy has answered the question, but it's also worth pointing out the solution to the syntax error in your original code. The parentheses alter the priority; so just remove them:
print join ':', @$hash{1,2};
More generally, put curly braces around the hash ref expression:
print join ':', @{$hash}{1,2};

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