Filter expression with triple equal

Setup

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

[
    {"key": 0},
    {"key": 42},
    {"key": -1},
    {"key": 1},
    {"key": 41},
    {"key": 43},
    {"key": 42.0001},
    {"key": 41.9999},
    {"key": 100},
    {"key": "some"},
    {"key": "42"},
    {"key": null},
    {"key": 420},
    {"key": ""},
    {"key": {}},
    {"key": []},
    {"key": [42]},
    {"key": {"key": 42}},
    {"key": {"some": 42}},
    {"some": "value"}
]

Results

Consensus

Not supported

Other responses

Bash (JSONPath.sh)

[]

Clojure (json-path) ¹

[
  {
    "key": null
  },
  {
    "some": "value"
  }
]

Elixir (jaxon)

[]

Elixir (warpath) ¹

[
  {
    "key": 42
  }
]

FSharp (FSharp.Data.JsonPath)

[]

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

[
  {
    "key": 42
  }
]

Golang (github.com-oliveagle-jsonpath) ¹

[]

JavaScript (Goessner) ²

[
  {
    "key": 42
  }
]

JavaScript (brunerd)

[
  {
    "key": 42
  }
]

JavaScript (jsonpath)

[
  {
    "key": 42
  }
]

JavaScript (jsonpath-plus)

[
  {
    "key": 42
  }
]

Java (com.jayway.jsonpath) ¹ ³

[
  {
    "key": 42
  }
]

Objective-C (SMJJSONPath) ¹ ³

[
  {
    "key": 42
  }
]

Python (jsonpath) ²

Not found

jsonpath returned false, this might indicate an error

Ruby (jsonpath)

[]

Swift (Sextant)

[
  {
    "key": 42
  }
]

dotNET (Json.NET)

[
  {
    "key": 42
  }
]

dotNET (JsonPathLib)

[
  {
    "key": 42
  }
]

Errors

Erlang (ejsonpath)

Timeout

Golang (github.com-spyzhov-ajson)

wrong symbol '=' at 9

JavaScript (json-p3)

unexpected filter selector token '=' ('ey===42)]':11)

JavaScript (jsonpathly)

Expected "$", "(", "@", "[", "count", "false", "length", "match", "null", "search", "true", "value", "{", number, or string but "=" found.

Java (com.github.jsurfer)

line 1:11 token recognition error at: '=4'
java.lang.NumberFormatException: Character " is neither a decimal digit number, decimal point, nor "e" notation exponential mark.

PHP (Goessner) ²

ArgumentCountError

Perl (JSON-Path)

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

Rust (jsonpath_plus)

Error Parsing JSON Path:
$[?(@.key===42)]
panic occurred

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.