Symmetric difference: Difference between revisions

=={{header|Picat}}==

Using the ordset module.

<lang Picat>import ordset.

go =>

A = ["John", "Serena", "Bob", "Mary", "Serena"].new_ordset(),

B = ["Jim", "Mary", "John", "Jim", "Bob"].new_ordset(),

println(symmetric_difference=symmetric_difference(A,B)),

println(symmetric_difference2=symmetric_difference2(A,B)),

println(subtractAB=subtract(A,B)),

println(subtractBA=subtract(B,A)),

println(union=union(A,B)),

println(intersection=intersection(A,B)),

nl.

symmetric_difference(A,B) = union(subtract(A,B), subtract(B,A)).

% variant

symmetric_difference2(A,B) = subtract(union(A,B), intersection(B,A)).</lang>

{{out}}

<pre>symmetric_difference = [Jim,Serena]

symmetric_difference2 = [Jim,Serena]

subtractAB = [Serena]

subtractBA = [Jim]

union = [Bob,Jim,John,Mary,Serena]

intersection = [Bob,John,Mary]</pre>