Man pages sections > man3 > Data::DPath::Filters

Data::DPath::Filters - Magic functions available inside filter conditions

Data::DPath::Filters(3pm) User Contributed Perl Documentation Data::DPath::Filters(3pm)

NAME

Data::DPath::Filters - Magic functions available inside filter conditions

API METHODS

affe

Mysterious test function. Will vanish. Soon. Or will it really? No, probably not. I like it. :-)
Returns true if the value eq "affe".

idx

Returns the current index inside array elements.
Please note that the current matching elements might not be in a defined order if resulting from anything else than arrays.

size

Returns the size of the current element. If it is an array ref it returns the number of elements, if it is a hash ref it returns number of keys, if it is a scalar it returns 1, everything else returns -1.

key

If it is a hashref returns the key under which the current element is associated as value. Else it returns undef.
This gives the key() function kind of a "look back" behaviour because the associated point is already after that key.

value

Returns the value of the current element.

isa

Frontend to UNIVERSAL::isa. True if the current element is_a given class.

reftype

Frontend to Scalar::Util::reftype.
Returns Scalar::Util::reftype of current element $_. With this you can do comparison by yourself with "eq", "=~", "~~" or whatever in filter expressions.

is_reftype($EXPECTED_TYPE)

Frontend to Scalar::Util::reftype.
Checks whether Scalar::Util::reftype of current element $_ equals the provided argument $EXPECTED_TYPE and returns true/false.

AUTHOR

Steffen Schwigon <ss5@renormalist.net> This software is copyright (c) 2017 by Steffen Schwigon.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
2017-09-23 perl v5.26.0