init(contentsOfJSONFile:columns:types:options:)

Declaration

init(contentsOfJSONFile url: URL, columns: [String]? = nil, types: [String : JSONType] = [:], options: JSONReadingOptions = .init()) throws

Parameters

• url:

  A URL to a JSON file.

• columns:

  An array of column names; Set to nil to use every column in the JSON file.

• types:

  A dictionary of column names and their JSON types. The data frame infers the types for column names that aren’t in the dictionary.

• options:

  The options that instruct how the data frame reads the JSON file.

Discussion

The JSON file should contain a sequence of objects where each object contains a value for every column name. Here’s an example with two columns “id” and “name”:

[
  {"id": 1, "name": "foo"},
  {"id": 2, "name": "bar"},
]

See Also

Creating a Data Frame from a JSON File

• init(jsonData:columns:types:options:)
• JSONType
• JSONReadingOptions