Returns a sequence containing the elements of one sequence that are not members of a second. You can supply a membership test function as test.
difference(#(1,2,3), #(2,3,4));
⇒ #(1)
open
| sequence-1 | An instance of <sequence>. |
| sequence-2 | An instance of <sequence>. |
| test: | An instance of <function>. The default is ==. |
| result-sequence | An instance of <sequence>. |