# filter Schema

```txt
http://jsonlogic.com/schemas/operators/array/filter.json#/oneOf/3
```

You can use filter to keep only elements of the array that pass a test. Note, that inside the logic being used to map, var operations are relative to the array element being worked on.


| Abstract            | Extensible | Status         | Identifiable | Custom Properties | Additional Properties | Access Restrictions | Defined In                                           |
| :------------------ | ---------- | -------------- | ------------ | :---------------- | --------------------- | ------------------- | ---------------------------------------------------- |
| Can be instantiated | No         | Unknown status | No           | Forbidden         | Forbidden             | none                | [var.json\*](common/var.json "open original schema") |

## 3 Type

`object` ([filter](var-oneof-filter.md))

## 3 Examples

```json
{
  "filter": [
    {
      "var": "integers"
    },
    {
      "%": [
        {
          "var": ""
        },
        2
      ]
    }
  ]
}
```

# filter Properties

| Property          | Type   | Required | Nullable       | Defined by                                                                                                            |
| :---------------- | ------ | -------- | -------------- | :-------------------------------------------------------------------------------------------------------------------- |
| [filter](#filter) | Merged | Required | cannot be null | [filter](map-properties-binary-arg.md "http://jsonlogic.com/schemas/common/binary-args.json#/properties/filter") |

## filter

Up to two args of valid JSON Logic data source.


`filter`

-   is required
-   Type: merged type ([Binary Arg](map-properties-binary-arg.md))
-   cannot be null
-   defined in: [filter](map-properties-binary-arg.md "http://jsonlogic.com/schemas/common/binary-args.json#/properties/filter")

### filter Type

merged type ([Binary Arg](map-properties-binary-arg.md))

one (and only one) of

-   [Array](binary-args-oneof-array.md "check type definition")
-   one (and only one) of

    -   one (and only one) of

        -   [var](all-operators-oneof-var.md "check type definition")
        -   [missing](all-operators-oneof-missing.md "check type definition")
        -   [missing_some](all-operators-oneof-missing_some.md "check type definition")
        -   [+](all-operators-oneof--4.md "check type definition")
        -   [/](all-operators-oneof--5.md "check type definition")
        -   [%](all-operators-oneof--2.md "check type definition")
        -   [\*](all-operators-oneof--3.md "check type definition")
        -   [-](all-operators-oneof--.md "check type definition")
        -   [all](all-operators-oneof-all.md "check type definition")
        -   [filter](var-oneof-filter.md "check type definition")
        -   [map](var-oneof-map.md "check type definition")
        -   [merge](var-oneof-merge.md "check type definition")
        -   [none](all-operators-oneof-none.md "check type definition")
        -   [reduce](var-oneof-reduce.md "check type definition")
        -   [some](all-operators-oneof-some.md "check type definition")
        -   [and](all-operators-oneof-and.md "check type definition")
        -   [Equal](all-operators-oneof-equal.md "check type definition")
        -   one (and only one) of

            -   [Untitled object in if](if-oneof-0.md "check type definition")
            -   [Untitled object in if](if-oneof-1.md "check type definition")
        -   [!](all-operators-oneof-.md "check type definition")
        -   [Not-Equal](all-operators-oneof-not-equal.md "check type definition")
        -   [!!](all-operators-oneof--1.md "check type definition")
        -   [or](all-operators-oneof-or.md "check type definition")
        -   [Strict Equal](all-operators-oneof-strict-equal.md "check type definition")
        -   [Strict Not-Equal](all-operators-oneof-strict-not-equal.md "check type definition")
        -   [in](all-operators-oneof-in.md "check type definition")
        -   [log](all-operators-oneof-log.md "check type definition")
        -   [method](all-operators-oneof-method.md "check type definition")
        -   [>](all-operators-oneof--8.md "check type definition")
        -   [>=](all-operators-oneof--9.md "check type definition")
        -   [<](all-operators-oneof--6.md "check type definition")
        -   [<=](all-operators-oneof--7.md "check type definition")
        -   [max](all-operators-oneof-max.md "check type definition")
        -   [min](all-operators-oneof-min.md "check type definition")
        -   [cat](all-operators-oneof-cat.md "check type definition")
        -   [substr](all-operators-oneof-substr.md "check type definition")
    -   one (and only one) of

        -   [Untitled undefined type in All](all-types-wo-array-oneof-0.md "check type definition")
        -   one (and only one) of

            -   [Empty object.](no-logic-object-oneof-empty-object.md "check type definition")
            -   [Non-Logic single key object.](no-logic-object-oneof-non-logic-single-key-object.md "check type definition")
            -   [Non-Logic multiple key object.](no-logic-object-oneof-non-logic-multiple-key-object.md "check type definition")