Add CC_dictionary, a convenient way of creating Dictionaries from Seq…

…uences

Sources/CornucopiaCore/Extensions/Sequence/Sequence+Dictionary.swift

@@ -0,0 +1,12 @@
+//
+//  Cornucopia – (C) Dr. Lauer Information Technology
+//
+public extension Sequence {
+
+    /// Create dictionary from sequence via keypath and value transformer.
+    func CC_dictionary<Key, Value>(keyPath: KeyPath<Element, Key>, valueTransformer: (Element) -> Value) -> [Key: Value] {
+        self.reduce(into: [Key: Value]()) { result, element in
+            result[element[keyPath: keyPath]] = valueTransformer(element)
+        }
+    }
+}