Description
Transforms a bag (array) of values into a bag of other values using the lambda expression. The lambda expression must be Ruby compliant.
Syntax
xplenty_rb.transform_bag(bag, lambda_expression)
Arguments
bag - bag.
lambda_expression - string containing a Ruby compliant expression to manipulate the bag prior to concatenation, such as sort or filter.
Examples
bag1 is [{"id": 2}, {"id": 1}, {"id": 3, "name": "My Name"}]
xplenty_rb.transform_bag(bag1,'|x| x.map { |y| JSON(y)["id"] }') returns the bag [(2),(1),(3)].
* The inner lambda expression is required because the bag actually contains tuples (manifested as arrays) of fields - in this case, arrays of a single element.
Return value datatype
Bag.
Notes
For more information, read How do I process JSON data.
Impact of null value
If input is null, returns null.
If the lambda expression is null or erroneous, the function fails.
