Create set-operations.js

Author: varun93

set-operations.js

@@ -0,0 +1,17 @@
+const intersect = (a, b) => {
+  return a.filter(element => b.indexOf(element) !== -1);
+};
+
+const difference = (a, b) => {
+  return a.filter(element => b.indexOf(element) === -1);
+};
+
+const union = (a, b) => {
+  const intersection = intersect(a, b);
+  return difference(a, intersection).concat(b);
+};
+
+const symmetricDifference = (a, b) => {
+  const intersection = intersect(a, b);
+  return difference(a.concat(b), intersection);
+};