Getting name of object in javascript

http://stackoverflow.com/questions/332422/how-do-i-get-the-name-of-an-objects-type-in-javascript

Getting name of an object in javascript

Vacuum Old Indexes

http://stackoverflow.com/questions/813839/how-can-i-remove-unused-indexes-in-google-application-engine

Deleting Unused Indexes

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When you are sure that old indexes are no longer needed, you can delete them from App Engine using the vacuum_indexes action:

./appengine-java-sdk/bin/appcfg.sh vacuum_indexes myapp/war
This command deletes all indexes for the app that are not mentioned in the local versions of datastore-indexes.xml and generated/datastore-indexes-auto.xml.