---
name: "Data::DPath::Filters"
section: "3pm"
platform: "linux"
package: "libdata-dpath-perl"
version: "0.60-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Data::DPath::Filters"
---

# Data::DPath::Filters(3pm)

Magic functions available inside filter conditions

## 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\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2024 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.