Operators in mule DataWeave

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.