$$map

Returns a mapped array applying the transformer on each of the elements

Usage

{ 
  "$$map": /* Array of elements */,
  "to": /* Transformer(##current,##index) */
}

"$$map(<to>):{input}"

note

Alternative form is available using

{
  "$$map": [ /* values */, /* to */ ]
}

If to is used, the primary argument is treated only as values

Returns

array - of type of to's result

Arguments

Argument	Type	Values	Required / Default Value	Description
Primary	array		Yes	Array of elements
to	Transformer(##current,##index)		Yes	Transformer to map each element to its value in the result array ##current - Current element ##index - Current index

Examples

Input

Definition

Output

{
  "value": 5,
  "item": {
    "foo": "aaa",
    "id": "bbb"
  },
  "items": [
    {
      "foo": "bar",
      "id": "aaa"
    },
    {
      "foo": "bar2",
      "id": "bbb"
    }
  ]
}

{
  "$$map": "$.items",
  "to": {
    "id": "##current.id",
    "map_foo": "##current.foo",
    "idx": "##index",
    "value": "$.value"
  }
}

[
  {
    "id": "aaa",
    "map_foo": "bar",
    "idx": 0,
    "value": 5
  },
  {
    "id": "bbb",
    "map_foo": "bar2",
    "idx": 1,
    "value": 5
  }
]

Test

{
  "value": 5,
  "item": {
    "foo": "aaa",
    "id": "bbb"
  },
  "items": [
    {
      "foo": "bar",
      "id": "aaa"
    },
    {
      "foo": "bar2",
      "id": "bbb"
    }
  ]
}

{
  "$$map": [
    "$.items",
    {
      "id": "##current.id",
      "map_foo": "##current.foo",
      "idx": "##index",
      "value": "$.value"
    }
  ]
}

[
  {
    "id": "aaa",
    "map_foo": "bar",
    "idx": 0,
    "value": 5
  },
  {
    "id": "bbb",
    "map_foo": "bar2",
    "idx": 1,
    "value": 5
  }
]

Test

{
  "value": 5,
  "item": {
    "foo": "aaa",
    "id": "bbb"
  },
  "items": [
    {
      "foo": "bar",
      "id": "aaa"
    },
    {
      "foo": "bar2",
      "id": "bbb"
    }
  ]
}

{
  "$$map": [
    "$.item",
    {
      "id": "##current.id",
      "map_foo": "##current.foo",
      "idx": "##index",
      "value": "$.value"
    }
  ]
}

null

Test

{
  "a": [
    1,
    2
  ],
  "b": [
    2,
    4
  ]
}

{
  "$$map": [
    [
      "$.a",
      "$.b"
    ],
    "##current[1]"
  ]
}

[
  2,
  4
]

Test

[
  {
    "a": 10
  },
  {
    "a": 11
  },
  {
    "a": 12
  }
]

"$$map(##current.a):$"

[
  10,
  11,
  12
]

Test