This document discusses common operations in Mule Dataweave including map, pluck, filter, and remove. Map applies a function to each element of an array and returns a new array. Pluck maps an object to an array by applying a function to each key-value pair. Filter returns an array or object containing only elements that pass the criteria in the provided function. Remove returns an array with specified indexes removed.

1. Operators in Mule Dataweave
In DataWeave you can carry out
many different operations on the
elements of a DataWeave transform.

2. Map
• Using Map to Return an Array
• (':array', ':function') ⇒ :array
• Returns an array that is the result of applying
a transformation function (lambda) to each of
the elements. The lambda is invoked with two
parameters: index and the value. If these
parameters are not named, the index is
defined by default as $$ and the value as $

4. output

5. • Pluck
• (':object', ':function') ⇒ ':array'
• Pluck is useful for mapping an object into an array.
Pluck is an alternate mapping mechanism to
mapObject. Like mapObject, pluck executes a lambda
over every key:value pair in its processed object, but
instead of returning an object, it returns an array,
which may be built from either the values or the keys
in the object.
• The lambda is invoked with two parameters: key and
the value. If these parameters are not named, the key
is defined by default as $$ and the value as $.

6. Filter
• Using Filter on an Array
• (':array', ':function') ⇒ ':array'
• Returns an array that only contains those that
pass the criteria specified in the lambda. The
lambda is invoked with two
parameters: index and the value. If these
parameters are not named, the index is
defined by default as $$ and the value as $.

8. output

9. Using Filter on an Object
• (':object', ':function') ⇒ ':object'
• Returns an object with the key:value pairs that
pass the acceptance criteria defined in the
lambda. If these parameters are not named,
the index is defined by default as $$ and the
value as $.

11. output

12. Remove
• Using Remove on an Array
• (':array', ':name') ⇒ ':array'
• When running it on an array, it returns
another array where the specified indexes are
removed.