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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? 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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