better definition of reusable general map

src/index.js

@@ -22,11 +22,11 @@ export const flowMap = (...fns) => _.map(_.flow(...fns))
 // Algebras
 // --------
 const isTraversable = x => _.isArray(x) || _.isPlainObject(x)
-const getMap = x => _.isArray(x) ? _.map : _.mapValues
+export const map = _.curry((f, x) => (_.isArray(x) ? _.map : _.mapValues)(f, x))
 // Map for any recursive algebraic data structure
 // defaults in multidimensional arrays and recursive plain objects
-export const deepMap = _.curry((fn, obj, map = null, is = isTraversable) =>
-    (map || getMap(obj))(e => is(e) ? deepMap(fn, fn(e), map, is) : e, obj))
+export const deepMap = _.curry((fn, obj, _map = map, is = isTraversable) =>
+    _map(e => is(e) ? deepMap(fn, fn(e), _map, is) : e, obj))
 
 // Misc
 // ----