Filter expression with equals on array of numbers

Setup

Selector: $[?(@==42)]

[
    0,
    42,
    -1,
    41,
    43,
    42.0001,
    41.9999,
    null,
    100
]

Results

Consensus

[
  42
]

Other responses

Bash (JSONPath.sh)

[]

C (json-glib)

Not supported

Unable to compile selector `$[?(@==42)]': Invalid array index definition “?(@==42)]”

Clojure (json-path) ¹

[
  null
]

Elixir (ExJsonPath)

Not supported

syntax error before: '=='

Elixir (jaxon)

[]

Erlang (ejsonpath)

[]

Golang (github.com-oliveagle-jsonpath) ¹

[]

Java (com.github.jsurfer)

Not supported

line 1:5 no viable alternative at input '@=='
org.antlr.v4.runtime.misc.ParseCancellationException

Kotlin (com.nfeld.jsonpathkt) ¹

Not supported

Unexpected char, char=?, index=2

Python (jsonpath-ng)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath-rw)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath2)

Not supported

line 1:6 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}
ValueError("line 1:6 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}")

Raku (JSON-Path)

Not supported

Evaluation of embedded Perl 6 code not allowed (construct with :allow-eval)

Rust (jsonpath)

[]

Rust (jsonpath_lib)

[]

dotNET (Manatee.Json)

Not supported

Sequence contains no elements

JSON (Path_Reference_Implementation)

Not supported

 --> 1:3
  |
1 | $[?(@==42)]
  |   ^---
  |
  = expected unionChild, unionArrayIndex, or sliceStart

Errors

JavaScript (jsonpath-plus)

jsonPath: Invalid or unexpected token: @==42

PHP (Goessner) ²

ArgumentCountError

PHP (softcreatr-jsonpath)

Error: 'Malformed filter query'

Perl (JSON-Path)

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

Footnotes