%dw 2.0
output application/json
var record = {
"title": "XQuery Kick Start",
"author": [
"James McGovern",
"Per Bothner",
"Kurt Cagle",
"James Linn",
"Kurt Cagle",
"Kurt Cagle",
"Kurt Cagle",
"Vaidyanathan Nagarajan"
],
"year":"2000"
}
---
{
"book" : {
"title" : record.title,
"year" : record.year,
"authors" : record.author distinctBy $
}
}
distinctBy
DataWeave 2.1 is compatible with Mule 4.1. Standard Support for Mule 4.1 ended on November 2, 2020, and this version of Mule will reach its End of Life on November 2, 2022, 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. |
distinctBy(Array<T>, (item: T, index: Number) -> Any): Array<T>
Returns unique values from a list (array) that might have duplicates. DataWeave uses the result of applying the provided lambda as the uniqueness criteria.
Parameters
Name | Description |
---|---|
|
The list ( |
|
The |
Example
This example removes duplicates of "Kurt Cagle"
from an input array.
Source
distinctBy(Null, (item: Nothing, index: Nothing) -> Any): Null
Helper function that allows distinctBy to work with null values.
distinctBy({ (K)?: V }, (value: V, key: K) -> Any): Object
Removes duplicate key-value pairs from an Object.
Parameters
Name | Description |
---|---|
|
The object from which to remove the key-value pairs. |
|
The |
Example
This example removes duplicates (<author>James McGovern</author>
)
from <book/>
.
Source
%dw 2.0
output application/xml
---
{
book : {
title : payload.book.title,
authors: payload.book.&author distinctBy $
}
}