tweakstreet-logo
  • Enter search terms

JSON Formatter

Function converting data to a JSON string

Evaluation

This expression evaluates to a function of the form:

(x) -> string

The function is consistent with formatter semantics used for data to string conversion, as used for example by the CSV Output step.

Processing

Argument x is converted into a JSON equivalent using the following rules:

  • dict values are converted to JSON objects
  • list values are converted to JSON arrays
  • string values are encoded as JSON strings
  • double and long values are encoded as JSON numbers
  • datetime values are encoded as per the given datetime formatter
  • binary values are encoded as a base64 string
  • nil is encoded as JSON null
  • NaN and (+-)Infinity are encoded as JSON null
  • function values are encoded as JSON null

Settings

Name Type Description
Pretty Print
 boolean

If true, the JSON includes line-breaks and indentation for better readability.

If false, the JSON is compact. Unnecessary whitespace is avoided.
Datetime Formatter
 function

A function of the form (datetime x) -> any used to encode datetime values. It accepts a single datetime argument x, and returns a value to encode in the JSON string. It must not return a datetime or binary value.

If nil, datetime values are encoded using ISO date format with millisecond precision and UTC offset. The underlying pattern is: uuuu-MM-dd'T'HH:mm:ss.SSSZZZZZ, and results in strings of the form: 2019-12-03T15:34:22.234+02:00
On this page