partition

DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

partition(Array<T>, (item: T) -> Boolean): { success: Array<T>, failure: Array<T> }

Separates the array into the elements that satisfy the condition from those that do not.

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.

Parameters

Name Description

array

The array of elements to split.

condition

The condition (or expression) used to match an element in the array.

Example

This example partitions numbers found within an input array. The even numbers match the criteria set by the lambda expression (item) → isEven(item). The odd do not. The function generates the "success" and "failure" keys within the output object.

Source

%dw 2.0
import * from dw::core::Arrays
output application/json
var arr = [0,1,2,3,4,5]
---
arr partition (item) -> isEven(item)

Output

{
  "success": [
    0,
    2,
    4
  ],
  "failure": [
    1,
    3,
    5
  ]
}

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