How to Find Unique Names from Input Using DataWeave: A Step-by-Step Guide – Integration-Anywhere

This article will help you practice your DataWeave skills in MuleSoft. Here we will find unique names from our Input. Let’s get started.

Input:

[
    [
        {
            "name":"john"
        },
        {
            "name":"leonardo"
        }
    ],
    [
        {
            "name": "leonardo"
        },
        {
            "name": "alicia"
        },
        {
            "name": "jennifer"
        },
        {
            "name": "john"
        }
    ]
]

Expected Output:

[
  "john",
  "leonardo",
  "alicia",
  "jennifer"
]

Let’s talk about the solution now. We are going to achieve this in multiple steps as follows:

Step 1:

This step will generate output like below-

[
  "john",
  "leonardo",
  "leonardo",
  "alicia",
  "jennifer",
  "john"
]

Dataweave Code:

%dw 2.0
output application/json
---
flatten(payload map ((item, index) -> item.name))

Step 2:

This step will generate the final expected output by using below dataweave code –

%dw 2.0
output application/json
---
flatten(payload map ((item, index) -> item.name)) distinctBy ((item, index) -> item)

Hope this helps improve your DataWeave skills. Thanks..!!