docs and minor tweaks...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Object.js

@@ -51,14 +51,34 @@ toObject(
 
 //---------------------------------------------------------------------
 
+// Make a copy of an object...
+//
+// This will:
+// 	- create a new object linked to the same prototype chain as obj
+// 	- copy obj own state
+//
+// NOTE: this will copy prop values and not props...
+Object.copy = function(obj, constructor){
+	return Object.assign(
+		constructor == null ?
+			Object.create(obj.__proto__)
+			: constructor(),
+		obj) }
+
+
 // Make a full key set copy of an object...
 //
+// NOTE: this will copy prop values and not props...
 // NOTE: this will not deep-copy the values...
-Object.flatCopy = function(obj){
+Object.flatCopy = function(obj, constructor){
 	return Object.deepKeys(obj)
-		.reduce(function(res, key){
-			res[key] = obj[key] 
-			return res }, {}) }
+		.reduce(
+			function(res, key){
+				res[key] = obj[key] 
+				return res },
+			constructor == null ?
+				{}
+				: constructor()) }
 
 
 // XXX for some reason neumric keys do not respect order...

README.md

@@ -8,9 +8,10 @@ A library of JavaScript type extensions, types and type utilities.
   - [Built-in type extensions](#built-in-type-extensions)
     - [`Object`](#object)
       - [`Object.deepKeys(..)`](#objectdeepkeys)
+      - [`Object.copy(..)`](#objectcopy)
+      - [`Object.flatCopy(..)`](#objectflatcopy)
       - [`Object.match(..)`](#objectmatch)
       - [`Object.matchPartial(..)`](#objectmatchpartial)
-      - [`Object.flatCopy(..)`](#objectflatcopy)
       - [`<object>.run(..)`](#objectrun)
       - [`Object.sort(..)`](#objectsort)
     - [`Array`](#array)
@@ -76,7 +77,7 @@ To extend everything:
 require('ig-types')
 ```
 
-To have access to library types and utilities:
+To have access to additional library types and utilities:
 ```javascript
 var types = require('ig-types')
 ```
@@ -84,20 +85,19 @@ var types = require('ig-types')
 `types.js` is organized so as to be able to import/extend only specific 
 sub-modules mostly independently so...
 
-In case there is a need to only extend a specific constructor:
+In case there is a need to only extend a specific constructor just import 
+the module dealing with that constructor (`Array` in this case):
 ```javascript
 // require `ig-types/<constructor-name>`...
 require('ig-types/Array')
 ```
+Note that type patching modules are mostly independent.
 
 And to import specific library modules only:
 ```javascript
 var containers = require('ig-types/containers')
 ```
 
-Note that though mostly independent now some sub-modules may import 
-others in the future.
-
 
 ## Built-in type extensions
 
@@ -105,12 +105,37 @@ others in the future.
 
 #### `Object.deepKeys(..)`
 
+```
+Object.deepKeys(<obj>)
+  -> <keys>
+```
+
+Get list of keys from all objects in the prototype chain.
+
+This is different from `Object.keys(..)` which only gets _own_ keys from the 
+current object.
+
+Example:
+```javascript
+var a = { x: 123 }
+var b = Object.create(a)
+b.y = 321
+
+// get own keys of b...
+Object.keys(b) // -> ['y']
+
+// get all keys accessible from b...
+Object.deepKeys(b) // -> ['x', 'y']
+```
+
+#### `Object.copy(..)`
+
+#### `Object.flatCopy(..)`
+
 #### `Object.match(..)`
 
 #### `Object.matchPartial(..)`
 
-#### `Object.flatCopy(..)`
-
 #### `<object>.run(..)`
 
 ```