Create readme.md

Author: manrick

Background Scripts/Get My Groups/readme.md

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+The GlideSystem User object has a useful function, which is called getMyGroups. This gives back the sys_ids of current user's group. But the functionality behaves differently depending where it is called from.
+
+If the function is called from Global scope a Java object (com.glide.collections.StringList) is returned:
+
+``` Javascript
+var currentUserGroups = gs.getUser().getMyGroups();
+gs.info(currentUserGroups);
+gs.info('Object type: ' + Object.prototype.toString.call(currentUserGroups));
+```
+
+Result:
+``` Text
+*** Script: [723aa84f5ba02200502f6ede91f91aea, cfcbad03d711110050f5edcb9e61038f]
+*** Script: Object type: [object JavaObject]
+```
+When the function is called from Application scope, the type will be a Javascript Array object:
+``` Text
+x_149822_va_code_p: 723aa84f5ba02200502f6ede91f91aea,cfcbad03d711110050f5edcb9e61038f
+x_149822_va_code_p: Object type: [object Array]
+```
+The main problem here is that the StringList class behaves differently like a generic JS Array. For example you cant get an element from the collection based on its index (currentUserGroups[0]).
+
+``` Text
+Javascript compiler exception: Java class "com.glide.collections.StringList" has no public instance field or method named "0". (null.null.script; line 8) in:
+var currentUserGroups = gs.getUser().getMyGroups();
+```
+The solution below gives a generic way, how this function can be called from both type of Applications:
+
+``` Javascript
+var currentUserGroups = gs.getUser().getMyGroups();
+
+if (Object.prototype.toString.call(currentUserGroups).match(/^\[object\s(.*)\]$/)[1] == "JavaObject") {
+    var arrayUtil = new global.ArrayUtil();
+    currentUserGroups = arrayUtil.convertArray(currentUserGroups);
+}
+
+gs.info(currentUserGroups);
+gs.info('Object type: ' + Object.prototype.toString.call(currentUserGroups));
+```
+
+Global:
+``` Text
+*** Script: 723aa84f5ba02200502f6ede91f91aea,cfcbad03d711110050f5edcb9e61038f
+*** Script: Object type: [object Array]
+```
+
+Scoped app:
+``` Text
+x_149822_va_code_p: 723aa84f5ba02200502f6ede91f91aea,cfcbad03d711110050f5edcb9e61038f
+x_149822_va_code_p: Object type: [object Array]
+```
+So with this simple solution the collection of groups can be handled as a JS Array in both cases.