Bracket notation with empty string

Setup

Selector: $['']

{"": 42, "''": 123, "\"\"": 222}

Results

Consensus

[
  42
]

Scalar consensus

The scalar consensus applies for implementations which return a single value where only one match is possible (instead of an array of a single value).

42

Other responses

Bash (JSONPath.sh)

[]

Elixir (jaxon)

[
  123
]

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

Not found

JavaScript (Goessner) ²

[
  {
    "": 42,
    "\"\"": 222,
    "''": 123
  }
]

PHP (Goessner) ²

[
  {
    "": 42,
    "\"\"": 222,
    "''": 123
  }
]

Python (jsonpath) ²

[
  {
    "": 42,
    "\"\"": 222,
    "''": 123
  }
]

Python (jsonpath2)

Not supported

line 1:2 token recognition error at: '''
ValueError("line 1:2 token recognition error at: '''")

Raku (JSON-Path)

Not supported

JSON path parse error at position 1

Rust (jsonpath)

Not supported

parsing error

Scala (jsonpath)

Not supported

JPError(end of input expected)

Swift (Sextant)

[]

dotNET (JsonPathLib)

[
  {
    "": 42,
    "\"\"": 222,
    "''": 123
  }
]

Errors

Clojure (json-path) ¹

java.lang.Exception object must be an array.

Golang (github.com-oliveagle-jsonpath) ¹

strconv.Atoi: parsing "''": invalid syntax

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.