Added methods U.Builder.isEmpty() and U.ArrayBuilder.isEmpty().

Author: javadev

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

@@ -3135,6 +3135,10 @@ public Builder clear() {
             return this;
         }
 
+        public boolean isEmpty() {
+            return data.isEmpty();
+        }
+
         public Builder add(final Builder builder) {
             data.put(String.valueOf(data.size()), builder.build());
             return this;
@@ -3241,6 +3245,10 @@ public ArrayBuilder clear() {
             return this;
         }
 
+        public boolean isEmpty() {
+            return data.isEmpty();
+        }
+
         public ArrayBuilder add(final ArrayBuilder builder) {
             data.addAll(builder.build());
             return this;

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

@@ -1371,6 +1371,7 @@ void objectBuilder() {
         builder.remove("1");
         assertEquals("{}", builder.build().toString());
         builder.clear();
+        builder.isEmpty();
         assertEquals("{}", builder.build().toString());
         builder.toChain();
         builder.addNull("key");
@@ -1422,6 +1423,7 @@ void arrayBuilder() {
         builder.remove(1);
         assertEquals("[1, 1, 2]", builder.build().toString());
         builder.clear();
+        builder.isEmpty();
         assertEquals("[]", builder.build().toString());
         builder.toChain();
         builder.addNull();