Add U.isNotEmpty(interable).

Author: javadev

src/main/java/com/github/underscore/U.java

@@ -2093,11 +2093,23 @@ public static <K, V> boolean isEmpty(final Map<K, V> object) {
      * Documented, #isEmpty
      */
     public static <T> boolean isEmpty(final Iterable<T> iterable) {
-        return iterable == null || size(iterable) == 0;
+        return iterable == null || !iterable.iterator().hasNext();
     }
 
     public boolean isEmpty() {
-        return iterable == null || size(iterable) == 0;
+        return iterable == null || !iterable.iterator().hasNext();
+    }
+
+    public static <K, V> boolean isNotEmpty(final Map<K, V> object) {
+        return object != null && !object.isEmpty();
+    }
+
+    public static <T> boolean isNotEmpty(final Iterable<T> iterable) {
+        return iterable != null && iterable.iterator().hasNext();
+    }
+
+    public boolean isNotEmpty() {
+        return iterable != null && iterable.iterator().hasNext();
     }
 
     /*
@@ -2706,6 +2718,10 @@ public boolean isEmpty() {
             return U.isEmpty(list);
         }
 
+        public boolean isNotEmpty() {
+            return U.isNotEmpty(list);
+        }
+
         public int size() {
             return U.size(list);
         }

src/test/java/com/github/underscore/ObjectsTest.java

@@ -244,6 +244,23 @@ public void isEmpty() {
         assertTrue(U.isEmpty(new HashMap<String, String>()));
         assertFalse(U.isEmpty(new HashMap<String, String>() { { put("", ""); } }));
     }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    public void isNotEmpty() {
+        assertFalse(U.isNotEmpty((List) null));
+        assertFalse(U.isNotEmpty(new ArrayList<String>()));
+        assertFalse(new U((List) null).isNotEmpty());
+        assertFalse(new U(new ArrayList<String>()).isNotEmpty());
+        assertFalse(U.chain((List) null).isNotEmpty());
+        assertFalse(U.chain(new ArrayList<String>()).isNotEmpty());
+        assertTrue(U.isNotEmpty(asList("")));
+        assertTrue(new U(asList("")).isNotEmpty());
+        assertTrue(U.chain(asList("")).isNotEmpty());
+        assertFalse(U.isNotEmpty((Map) null));
+        assertFalse(U.isNotEmpty(new HashMap<String, String>()));
+        assertTrue(U.isNotEmpty(new HashMap<String, String>() { { put("", ""); } }));
+    }
 /*
 _.isObject({});
 => true