Filter expression with length function

Setup

Selector: $[?(@.length() == 4)]

[
  [1,2,3,4,5],
  [1,2,3,4],
  [1,2,3]
]

Results

Consensus

Not supported

Other responses

Bash (JSONPath.sh)

[]

Clojure (json-path) ¹

[]

Elixir (jaxon)

[]

Golang (github.com-bhmj-jsonslice) ¹ ³

[
  [
    1,
    2,
    3,
    4
  ]
]

Golang (github.com-oliveagle-jsonpath) ¹

[]

Golang (github.com-spyzhov-ajson)

[]

JavaScript (jsonpath)

[]

Java (com.jayway.jsonpath) ¹ ³

[
  [
    1,
    2,
    3,
    4
  ]
]

Objective-C (SMJJSONPath) ¹ ³

[
  [
    1,
    2,
    3,
    4
  ]
]

PHP (remorhaz-jsonpath)

[
  [
    1,
    2,
    3,
    4
  ]
]

PHP (softcreatr-jsonpath)

[]

Python (jsonpath) ²

Not found

jsonpath returned false, this might indicate an error

Ruby (jsonpath)

[
  [
    1,
    2,
    3,
    4,
    5
  ],
  [
    1,
    2,
    3,
    4
  ],
  [
    1,
    2,
    3
  ]
]

Swift (Sextant)

[
  [
    1,
    2,
    3,
    4
  ]
]

dotNET (Manatee.Json)

[
  [
    1,
    2,
    3,
    4
  ]
]

Errors

JavaScript (Goessner) ²

jsonPath: _v.length is not a function: _v.length() == 4

JavaScript (brunerd)

Invocation violation: length()

JavaScript (jsonpath-plus)

jsonPath: _$_v.length is not a function: @.length() == 4

JavaScript (jsonpathly)

no viable alternative at input '@.length()'

PHP (Goessner) ²

ArgumentCountError

Perl (JSON-Path)

non-safe evaluation, died at main.pl line 11.

Rust (jsonpath_plus)

Error Parsing JSON Path:
$[?(@.length() == 4)]
panic occurred

dotNET (JsonPathLib)

Property 'length' of object is not a function

Footnotes

• ¹ This implementation returns a single value where only one match is possible (instead of an array of a single value).
• ² This implementation returns a specific not found value if no match exists.
• ³ This implementation returns a specific not found value if a query that would regularly return a single match results in no match.