I'm as big a fan of grep and map as the next guy, but sometimes they just don't make sense. In this case, I think a plain for loop would be clearer:

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

for (@$parts) {
  my $hash = { PARTNAME => $_ };

  $hash->{SELECTED}++
      if $_ eq $row->{title};

  push @$newLoop, $hash;
}

[download]

Or, if anything, just a single map call, but this demonstrates why I prefer the for loop:

my $parts = [ 'Part1', 'Part2','Part3' ];
my $newLoop = [ map {{ PARTNAME => $_,
                        $_ eq $row->{title}
                           ? (SELECTED => 1)
                           : ()
                    }} @$parts ];

[download]

Update: Joost beat me to the punch on the single-map part, but I still prefer my first snippet.

In reply to Re: map and grep syntax question by revdiablo
in thread map and grep syntax question by geektron

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