filter

Returns a listObject with objects having the key attribute matching one of the given key values.

Category

List

Function syntax

filter(<parameters>)

Parameters

Signatures and returned types

filter(listObject, string, listString)

filter(listObject, string, listInteger)

filter(listObject, string, listDecimal)

filter(listObject, string, listDateTime)

filter(listObject, string, listDateTimeOnly)

filter(listObject, string, listDateOnly)

filter(listObject, string, listDuration)

filter(listObject, string, listBoolean)

Returns a listObject.

Examples

Here is an example of a payload passed in an incoming event “myevent”:

"productListItems": [{
   "id": "product1",
   "name": "the product 1",
   "price": 20
},{
   "id": "product2",
   "name": "the product 2",
   "price": 30
},{
   "id": "product3",
   "name": "the product 3",
   "price": 50
}]

You can use the following expression:

filter(
 @event{myevent.productListItems},
 "id",
 ["product2", "product3", "product4"]
)

Returns a listObject containing the two objects with “product2” and “product3” as id.