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

[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};