June 2018 Update

Task/Power-set/Swift/power-set-1.swift

@@ -0,0 +1,15 @@
+func powersetFrom<T>(_ elements: Set<T>) -> Set<Set<T>> {
+  guard elements.count > 0 else {
+    return [[]]
+  }
+  var powerset: Set<Set<T>> = [[]]
+  for element in elements {
+    for subset in powerset {
+      powerset.insert(subset.union([element]))
+    }
+  }
+  return powerset
+}
+
+// Example:
+powersetFrom([1, 2, 4])

Task/Power-set/Swift/power-set-2.swift

@@ -0,0 +1,2 @@
+//Example:
+powersetFrom(["a", "b", "d"])