Add has method

README.md

@@ -151,6 +151,30 @@ db('profile').get(['phil', 'join_date']); // undefined
 db('profile').get(['phil', 'img']); // { width: 55, height: 20 }
 ```
 
+### has(property)
+
+Checks to see if it has a property.
+
+Parameters:
+
+- ``property``: _String_
+
+Returns: _Boolean_
+
+Example:
+
+```js
+{
+  'bar': 'some kind of data',
+  'baz': 'some kind of data'
+}
+
+console.log(db('foo').has('bar'));
+//=> true
+console.log(db('foo').has('boo'));
+//=> false
+```
+
 ### delete(property)
 
 Delete a property.

index.js

@@ -102,6 +102,10 @@ module.exports = function(dbDir) {
         return cacheObject[file];
       },
 
+      has: function(prop) {
+        return cacheObject[file].hasOwnProperty(prop);
+      },
+
       delete: function(prop) {
         delete cacheObject[file][prop];
         save();

test/index.js

@@ -119,6 +119,24 @@ describe('database', () => {
 
   });
 
+  describe('has prop', () => {
+
+    beforeEach(() => {
+      db = origindb('db');
+    });
+
+    it('should have a prop', () => {
+      db('foo').set('yo', 'ho');
+      assert.deepEqual(db('foo').has('yo'), true);
+    });
+
+    it('should not have a prop', () => {
+      db('foo').delete('yo');
+      assert.deepEqual(db('foo').has('yo'), false);
+    });
+
+  });
+
   describe('delete prop', () => {
 
     beforeEach(() => {