Re: Shortcut operator for $a->{'b'}=$b if $b;

[Codon]

What is the correlation between 'b' and $b? Is one used to derive the other? If so, then map may help.

$a = {
    map {
        $val = some_derivation($_)
            ? ( $_ => $val ) 
            : ()
    } qw(a b c)
};