In our last episode, we saw:

@array = [8,9,10], [4,5,6], [7,8,9]; 
@sorted = sort { $a->[1] <=> $b->[1] } @array
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in which our nearly knowledgable hero is probably now thumping his head on his desk, realizing that he should have written:

@array = ([8,9,10], [4,5,6], [7,8,9]); 
@sorted = sort { $a->[1] <=> $b->[1] } @array
[download]

Because the precedence rules say so, otherwise the second and third element are just tossed off to never-never land.

-- Randal L. Schwartz, Perl hacker