not_null

TABLE OF CONTENTS

• Definition
• Parameters
• Returns
• Examples

Find first argument that is not null

Definition

any not_null(any *$argument [, any $...])

Returns the first argument that does not resolve to null. Accepts one or more arguments, and will evaluate them in order until a non-null argument is encountered. If all arguments' values resolve to null, then a value of null is returned.

Parameters

any *$argument

One or more arguments of any type, separated by comma.

Returns

any

The first argument provided that does not resolve to null.

Examples

{
  "null1": null,
  "null2": null,
  "empty_array": [],
  "text": "alpha"
}

{
  a: not_null(nonexistent, null1, null2, empty_array, text),
  b: not_null(null1, null2, `null`, text, empty_array),
  c: not_null(null1, null2)
}

{
  "a": [],
  "b": "alpha",
  "c": null
}