Code Blocks are a hugely powerful core node that allow you to do many things by directly entering functions and code in the Code Block.
Code Block – String operations
Code Block – List methods
In the example below, various Flatten methods are shown in the Code Block. This would be an alternative to using the List.Flatten or Flatten nodes.
More on Code Blocks at http://dynamobim.com/cbns-for-dummies/ such as: