Use .apply for initial function call in _.compose then use .call in loop. [closes #463, #464]

lodash.js

@@ -4672,14 +4672,17 @@
           throw new TypeError;
         }
       }
+      var funcsLength = funcs.length;
+      if (funcsLength === 1) {
+        return funcs[0];
+      }
       return function() {
-        var args = arguments,
-            length = funcs.length;
-
+        var length = funcsLength - 1,
+            result = funcs[length].apply(this, arguments);
         while (length--) {
-          args = [funcs[length].apply(this, args)];
+          result = funcs[length].call(this, result);
         }
-        return args[0];
+        return result;
       };
     }
 

test/test.js

@@ -1259,6 +1259,12 @@
       var welcome = _.compose(greet, format);
       equal(welcome('pebbles'), 'Hiya Penelope!');
     });
+    
+    test('should return original function if only one function passed', 1, function(){
+      var noop = function(){};
+      equal(_.compose(noop), noop);
+    });
+
   }());
 
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