Added HasData()

Added a new function to be able to check if data has been already saved by the provided key. Unlike GetData(), HasData() will not throw an exception if the customData table has not been created yet.

Author: VulcanShot

QueryArray.nut

@@ -115,6 +115,20 @@ class csQuery.QueryArray {
         return this;
     }
 
+    function HasData(key) {
+        local env = { key = key, hasData = false }
+        this.Each(function (ent) {
+            ent.ValidateScriptScope();
+            local scope = ent.GetScriptScope();
+            if (!("customData" in scope))
+                return;
+
+            if (key in scope.customData)
+                hasData = true;
+        }.bindenv(env));
+        return env.hasData;
+    }
+
     function GetData(key) {
         return getData(false, key)
     }