Converting a CSV list to a list of hashrefs naming the fields

[merlyn]

Description:

OK, there's been this recent discussion on comp.lang.perl.misc, and it's gotten perverse enough to drag one of the postings over to the monestary.

A simple mechanism to turn a list of comma-separated-values into a list of hashrefs, each hashref naming the fields from the comma-separated-values. When we got to using the term "hashificator", I knew it needed a wider audience. Enjoy!

According to Anno Siegel <[e-mail]>:
> According to Randal L. Schwartz <[e-mail]>:
>
> [...]
>
> > More perversely perlish:
> >
> >     @game = map +{
> >       (qw/name score date/, split /,/)[0,3,1,4,2,5]
> >     }, @scores;
> >
> > Do Not Try This At Home. :)
>
> Ah... retro-hashification of the unwieldy.  I knew there had to
> be something like that.

...and it generalizes:

    my @keys = qw/name score date comment/;
    my @hashificator = map( ( $_, $_ + @keys), 0 .. @keys - 1);
    @game = map +{
        (@keys, split /,/)[ @hashificator]
    }, @scores;

[MeowChow]

Why not simply:

my @keys = qw/name score date comment/;

my @game;
@{$game[@game]}{@keys} = split /,/ for @scores;

   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

[merlyn]

Yes, that was one of the alternatives, but the idea of doing it as a stream for a possibly larger pipeline suggested the use of a map.

-- Randal L. Schwartz, Perl hacker