$$filter

Filter input array to all the elements that satisfy the predicate transformer.

Usage

{
  "$$filter": [ /* values */ ],
  "by": /* Transformer */
}

Returns

array (same items type as input)

info

by should resolve to a boolean value, it uses the truthy logic

Arguments

Argument	Type	Values	Required / Default Value	Description
Primary	array		Yes	Array of elements
by	Transformer(##current)	Input is ##current (current element)	Yes	A predicate transformer for an element

Examples

Input

Definition

Output

[
  "a",
  null,
  "b",
  "",
  false,
  true
]

{ 
  "$$filter": "$", 
  "by": "##current" 
}

[
  "a",
  "b",
  true
]