Add deep functionality for _.omit and _.pick. (#2794)

lodash.js

@@ -3757,7 +3757,7 @@
     function basePick(object, props) {
       object = Object(object);
       return basePickBy(object, props, function(value, key) {
-        return key in object;
+        return hasIn(object, key);
       });
     }
 
@@ -3777,10 +3777,10 @@
 
       while (++index < length) {
         var key = props[index],
-            value = object[key];
+            value = get(object, key);
 
         if (predicate(value, key)) {
-          baseAssignValue(result, key, value);
+          set(result, key, value);
         }
       }
       return result;

test/test.js

@@ -16386,6 +16386,12 @@
 
       assert.deepEqual(_.omit({ '0': 'a' }, 0), {});
     });
+
+    QUnit.test('should work with deep properties', function(assert) {
+      assert.expect(1);
+
+      assert.deepEqual(_.omit({ 'a': 1, 'b': { 'c': 2 } }, 'b.c'), { 'a': 1, 'b': {} });
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -17608,6 +17614,12 @@
 
       assert.deepEqual(_.pick({ '0': 'a', '1': 'b' }, 0), { '0': 'a' });
     });
+
+    QUnit.test('should work with deep properties', function(assert) {
+      assert.expect(1);
+
+      assert.deepEqual(_.pick({ 'a': 1, 'b': { 'c': 2 } }, 'b.c'), { 'b': { 'c': 2 } });
+    });
   }());
 
   /*--------------------------------------------------------------------------*/