subset? ( list1 As List, _
list2 As List, _
Optional key As Name = Identity, _
Optional test As Name = Equal ) As List| Argument | Type | Description |
|---|---|---|
| list1 | List | the first list |
| list2 | List | the second list |
| key | Name | Optional; the name of function to be called with each item in the lists; the function takes two arguments; the default is Identity. |
| test | Name | Optional; the name of test function to be applied to "key" results of items in the lists; the function takes two arguments; the default is Equal. |