Symmetric difference: Difference between revisions

=={{header|Wren}}==

{{libheader|Wren-set}}

<lang ecmascript>import "/set" for Set

var symmetricDifference = Fn.new { |a, b| a.except(b).union(b.except(a)) }

var a = Set.new(["John", "Bob", "Mary", "Serena"])

var b = Set.new(["Jim", "Mary", "John", "Bob"])

System.print("A = %(a)")

System.print("B = %(b)")

System.print("A - B = %(a.except(b))")

System.print("B - A = %(b.except(a))")

System.print("A △ B = %(symmetricDifference.call(a, b))")</lang>

{{out}}

<pre>

A = <Serena, Bob, Mary, John>

B = <Jim, Bob, Mary, John>

A - B = <Serena>

B - A = <Jim>

A △ B = <Serena, Jim>

</pre>