i got what i thought was a wonderful  grep {} map () trick from a previous post ( abstraction -- level up! ), but today, my brain must be mush, because i can't get results.

i'm trying to get an arrayref from this: 

my $parts = [ 'Part1', 'Part2','Part3' ];

my $newLoop = [ grep { $_->{SELECTED}++ 
                  if $_->{PARTNAME} eq $row->{title}, $_ }
                map +{ 'PARTNAME' => $_ }, @$parts ] ;

[download]
but Data::Dumper is showing me that  $newLoop is empty ...

what i expect:

the map call returns an array of hashrefs
grep runs through the array returned and sets the "selected" element ...
but i'm missing something, and my eyes aren't seeing it ...

In reply to map and grep syntax question by geektron

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