Data commit

Task/Symmetric-difference/Groovy/symmetric-difference-1.groovy

@@ -0,0 +1,5 @@
+def symDiff = { Set s1, Set s2 ->
+    assert s1 != null
+    assert s2 != null
+    (s1 + s2) - (s1.intersect(s2))
+}

Task/Symmetric-difference/Groovy/symmetric-difference-2.groovy

@@ -0,0 +1,93 @@
+Set a = ['John', 'Serena', 'Bob', 'Mary', 'Serena']
+Set b = ['Jim', 'Mary', 'John', 'Jim', 'Bob']
+
+assert a.size() == 4
+assert a == (['Bob', 'John', 'Mary', 'Serena'] as Set)
+assert b.size() == 4
+assert b == (['Bob', 'Jim', 'John', 'Mary'] as Set)
+
+def aa = symDiff(a, a)
+def ab = symDiff(a, b)
+def ba = symDiff(b, a)
+def bb = symDiff(b, b)
+
+assert aa.empty
+assert bb.empty
+assert ab == ba
+assert ab == (['Jim', 'Serena'] as Set)
+assert ab == (['Serena', 'Jim'] as Set)
+
+println """
+a: ${a}
+b: ${b}
+
+Symmetric Differences
+=====================
+a <> a: ${aa}
+a <> b: ${ab}
+b <> a: ${ba}
+b <> b: ${bb}
+
+
+"""
+
+Set apostles = ['Matthew', 'Mark', 'Luke', 'John', 'Peter', 'Paul', 'Silas']
+Set beatles = ['John', 'Paul', 'George', 'Ringo', 'Peter', 'Stuart']
+Set csny = ['Crosby', 'Stills', 'Nash', 'Young']
+Set ppm = ['Peter', 'Paul', 'Mary']
+
+def AA = symDiff(apostles, apostles)
+def AB = symDiff(apostles, beatles)
+def AC = symDiff(apostles, csny)
+def AP = symDiff(apostles, ppm)
+
+def BA = symDiff(beatles, apostles)
+def BB = symDiff(beatles, beatles)
+def BC = symDiff(beatles, csny)
+def BP = symDiff(beatles, ppm)
+
+def CA = symDiff(csny, apostles)
+def CB = symDiff(csny, beatles)
+def CC = symDiff(csny, csny)
+def CP = symDiff(csny, ppm)
+
+def PA = symDiff(ppm, apostles)
+def PB = symDiff(ppm, beatles)
+def PC = symDiff(ppm, csny)
+def PP = symDiff(ppm, ppm)
+
+assert AB == BA
+assert AC == CA
+assert AP == PA
+assert BC == CB
+assert BP == PB
+assert CP == PC
+
+println """
+apostles: ${apostles}
+ beatles: ${beatles}
+    csny: ${csny}
+     ppm: ${ppm}
+
+Symmetric Differences
+=====================
+apostles <> apostles: ${AA}
+apostles <> beatles:  ${AB}
+apostles <> csny:     ${AC}
+apostles <> ppm:      ${AP}
+
+beatles <> apostles:  ${BA}
+beatles <> beatles:   ${BB}
+beatles <> csny:      ${BC}
+beatles <> ppm:       ${BP}
+
+csny <> apostles:     ${CA}
+csny <> beatles:      ${CB}
+csny <> csny:         ${CC}
+csny <> ppm:          ${CP}
+
+ppm <> apostles:      ${PA}
+ppm <> beatles:       ${PB}
+ppm <> csny:          ${PC}
+ppm <> ppm:           ${PP}
+"""