Added nonEmpty-String and -Json checks

Author: alexanderdean

src/js/helpers.js

@@ -85,13 +85,27 @@ SnowPlow.isJson = function (property) {
 	return (SnowPlow.isDefined(property) && SnowPlow.isNotNull(property) && property.constructor === {}.constructor);
 }
 
+/*
+ * Is property a non-empty JSON?
+ */
+SnowPlow.isNonEmptyJson = function (property) {
+	return SnowPlow.isJson(property) && property !== {};
+}
+
 /*
  * Is property a string?
  */
 SnowPlow.isString = function (property) {
 	return typeof property === 'string' || property instanceof String;
 }
 
+/*
+ * Is property a non-empty string?
+ */
+SnowPlow.isNonEmptyString = function (property) {
+	return SnowPlow.isString(property) && property !== '';
+}
+
 /*
  * Is property a date?
  */