add function maxVal & minVal

underscore.object.selectors.js

@@ -109,6 +109,24 @@
 
     keysFromPath: keysFromPath,
 
+    //Returns the property with the greatest numeric value in an object along with it's key in an array [key,value]. 
+    maxVal: function(obj){
+
+      return Object.keys(obj).reduce(function(currentVal, key){
+        return obj[key] > currentVal[1] ? [key,obj[key]] : currentVal 
+      }, ["key",-Infinity]);
+
+    },
+
+     //Returns the property with the least numeric value in an object along with it's key in an array [key,value]. 
+    minVal: function(obj){
+
+      return Object.keys(obj).reduce(function(currentVal, key){
+        return currentVal[1] > obj[key] ? [key,obj[key]] : currentVal 
+      }, ["key",Infinity]);
+
+    },
+
     pickWhen: function(obj, pred) {
       var copy = {};