Filter expression with equals
Setup
Selector: $[?(@.key==42)]
[
{"key": 0},
{"key": 42},
{"key": -1},
{"key": 1},
{"key": 41},
{"key": 43},
{"key": 42.0001},
{"key": 41.9999},
{"key": 100},
{"key": "some"},
{"key": "42"},
{"key": null},
{"key": 420},
{"key": ""},
{"key": {}},
{"key": []},
{"key": [42]},
{"key": {"key": 42}},
{"key": {"some": 42}},
{"some": "value"}
]
Results
Other responses
Bash (JSONPath.sh)
[
42,
"42"
]
C (json-glib)
Not supported
Unable to compile selector `$[?(@.key==42)]': Invalid array index definition “?(@.key==42)]”
Clojure (json-path)
¹
[
{
"key": null
},
{
"some": "value"
}
]
Cpp (jsoncons)
[
{
"key": 42
}
]
Dart (json_path)
[
{
"key": 42
}
]
Elixir (ExJsonPath)
[
{
"key": 42
}
]
Elixir (jaxon)
[]
Elixir (warpath)
¹
[
{
"key": 42
}
]
Erlang (ejsonpath)
[
{
"key": 42
}
]
[
{
"key": 42
}
]
[
{
"key": 42
},
{
"key": "42"
}
]
[
{
"key": 42
}
]
[]
[
{
"key": 42
}
]
[
{
"key": 42
}
]
Haskell (jsonpath)
[
{
"key": 42
}
]
JavaScript (Goessner)
²
[
{
"key": 42
},
{
"key": "42"
},
{
"key": [
42
]
}
]
JavaScript (brunerd)
[
{
"key": 42
}
]
JavaScript (jsonpath)
[
{
"key": 42
},
{
"key": "42"
},
{
"key": [
42
]
}
]
JavaScript (jsonpath-plus)
[
{
"key": 42
},
{
"key": "42"
},
{
"key": [
42
]
}
]
JavaScript (jsonpathly)
[
{
"key": 42
}
]
Java (com.jayway.jsonpath)
¹
³
[
{
"key": 42
},
{
"key": "42"
}
]
Kotlin (com.nfeld.jsonpathkt)
¹
Not supported
Unexpected char, char=?, index=2
Objective-C (SMJJSONPath)
¹
³
[
{
"key": 42
},
{
"key": "42"
}
]
PHP (galbar-jsonpath)
[
{
"key": 42
}
]
PHP (remorhaz-jsonpath)
[
{
"key": 42
}
]
PHP (softcreatr-jsonpath)
[
{
"key": 42
},
{
"key": "42"
}
]
Python (jsonpath)
²
[
{
"key": 42
}
]
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 1:10 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}
ValueError("line 1:10 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}")
Python (python-jsonpath)
[
{
"key": 42
}
]
Raku (JSON-Path)
Not supported
Evaluation of embedded Perl 6 code not allowed (construct with :allow-eval)
Ruby (jsonpath)
[
{
"key": 42
},
{
"key": "42"
}
]
Rust (jsonpath)
[]
Rust (jsonpath_lib)
[
{
"key": 42
}
]
Rust (jsonpath_plus)
[
{
"key": 42
}
]
Rust (serde_json_path)
[
{
"key": 42
}
]
Scala (jsonpath)
[
{
"key": 42
}
]
Swift (Sextant)
[
{
"key": 42
},
{
"key": "42"
}
]
dotNET (Json.NET)
[
{
"key": 42
}
]
dotNET (JsonCons.JsonPath)
[
{
"key": 42
}
]
dotNET (JsonPath.Net)
[
{
"key": 42
}
]
dotNET (Manatee.Json)
[
{
"key": 42
}
]
Errors
Java (com.github.jsurfer)
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.
dotNET (JsonPathLib)
Accessed JArray values with invalid key value: "valueOf". Int32 array index expected.
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.