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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.

--(Array<S>, Array<Any>): Array<S>

Removes specified items from a list (an array).

Name Description

source

The list (an Array type).

toRemove

Items to remove from the list.

Example

This example removes a items from a list.

Source

%dw 2.0
output application/json
---
{ "a" : [0, 1, 1, 2] -- [1,2] }

Output

{
  "a": [0]
}

--({ (K)?: V }, Object): { (K)?: V }

Removes specified key-value pairs from an object.

Parameters

Name Description

source

The object.

toRemove

Objects to remove from the source object.

Example

This example removes a key-value pair from the source object.

Source

%dw 2.0
output application/json
---
{
   "hello" : "world",
   "name" : "DW"
} -- { "hello" : "world"}

Output

{
   "name": "DW"
}

--(Object, Array<String>)

Removes specified key-value pairs from an object.

Parameters

Name Description

source

The source object (an Object type).

toRemove

Keys for the key-value pairs to remove from the source object.

Example

This example removes two key-value pairs from the source object.

Source

%dw 2.0
output application/json
---
{
   "yes" : "no",
   "good" : "bad",
   "old" : "new"
} -- ["yes", "old"]

Output

{
   "good": "bad"
}

--(Object, Array<Key>)

Removes specified key-value pairs from an object.

Parameters

Name Description

source

The source object (an Object type).

keys

A keys for the key-value pairs to remove from the source object.

Example

This example specifies the key-value pair to remove from the source object.

Source

%dw 2.0
output application/json
---
{
   "hello" : "world",
   "name" : "DW"
 } -- ["hello" as Key]

Output

{
   "name": "DW"
}