Is it a JSON object or array?

Structural check (not a full parse): the trimmed value is delimited by { } with at least one "key": member, or by [ ]. Catches the common "serialized structure in a cell" case; deeply malformed JSON that still has the outer shape may pass, which is acceptable for column-level typing.

[ ]: R:%20

Usage

is_json(x)

Arguments

x

A character vector.

Value

Logical vector; TRUE for a JSON object or array literal.

See also

Other serialized detectors: is_tags()

Examples

is_json(c('{"a":1,"b":[2,3]}', "[1,2,3]", "not json", NA))
#> [1]  TRUE  TRUE FALSE    NA