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SLOYD / Alt-Data-Frame-ButMore-0.004_003 / lib / Data / Frame / Partial / Eval.pm 

            

              
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package Data::Frame::Partial::Eval;
# ABSTRACT: Partial class for data frame's eval method
use Data::Frame::Role;
use namespace::autoclean;
use Eval::Quosure 0.001;
use Types::Standard;
use Data::Frame::Indexer qw(indexer_s);
method eval_tidy ($x) {
    my $is_quosure = $x->$_DOES('Eval::Quosure');
    if (ref($x) and not $is_quosure) {
        return $x;
    }
    my $expr = $is_quosure ? $x->expr : $x;
    if ( $self->exists($expr) ) {
        return $self->at( indexer_s($expr) );
    }
    my $quosure = $is_quosure ? $x : Eval::Quosure->new( $expr, 1 );
    # If expr matches a column name in the data frame, return the column.
    my $column_vars = {
        $self->names->map(
            sub {
                my $var = '$' . ( $_ =~ s/\W/_/gr );
                $var => $self->at($_);
            }
        )->flatten
    };
    return $quosure->eval($column_vars);
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Data::Frame::Partial::Eval - Partial class for data frame's eval method
=head1 VERSION
version 0.004_003
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 METHODS
=head2 eval_tidy
    eval_tidy($x)
=head1 SEE ALSO
L<Data::Frame>, L<Eval::Quosure>
=head1 AUTHORS
=over 4
=item *
Zakariyya Mughal <zmughal@cpan.org>
=item *
Stephan Loyd <sloyd@cpan.org>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014, 2019 by Zakariyya Mughal, Stephan Loyd.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut