Drop all objects of a schema

Purpose:
login as schema owner and cleanup all objects.

SQL:

set pagesize 0
spool ydropobj.sql
select 'drop table ' || table_name || ' cascade constraints purge;' from user_tables
;
spool off
--@ydropobj.sql
spool ydropobj.sql
select 'drop ' || object_type ||' ' || object_name || ' ;' from user_objects
;
spool off
--@ydropobj.sql
set pagesize 9999
select count(*) from user_objects;