Oh, #@%$£"!

I admit defeat. A sort is probably not what the OP specified. One could build a full temporary hash in the map but that would be cheating as well (also relies on $a not been used for anything else before):

my %hash = map { /^([^-]*)-(.*)$/; exists $$a{$1}? (push(@{$$a{$1}},$2
+) and ()): ( $1=>$$a{$1}=[$2] ) } @CELLS;

[download]

So there is really no way around first declaring the hash and then filling it. What a pity!

In reply to Re^3: Generating Hash-of-List using map? by hdb
in thread Generating Hash-of-List using map? by cmv

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