To make it work I need to resort to: 
print sort grep {1} uniq 0,0,1,2;

I know it's mentioned in the node that Roy Johnson linked to, but I think it bears repeating that you don't need to resort to such arcane chicanery. Simply adding parentheses does the trick: 

print sort(uniq(0,0,1,2));

[download]

duff

In reply to Re: When is a function call not a function call by duff
in thread When is a function call not a function call by dpuu

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