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All proposals are cheating so far! Here is what you are looking for (warning: dirty code!)

my %hash = map { /^([^-]*)-(.*)$/; if( $1 eq ($a//'-') ) { push @$b, $ +2; () } else { ( $a = $1 => $b = [ $2 ] ) } } @CELLS;

Of course, should $a accidentally be identical to the bit left of the hyphen in the first element of @CELLS, then it fails...

UPDATE: Small improvement on the else branch.

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

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