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Removing duplicates

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Top Forums Shell Programming and Scripting Removing duplicates
# 8  
Old 04-27-2011
T1 is a sub branch of T4 just like T3. So it needs to appear along with T3. So final sort has to be this way:

Code:
T5          |         1
  T4        |         2
    T1      |         3
    T3      |         3
T2          |         1
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LEARN ABOUT LINUX

snmpa_local_db

snmpa_local_db(3erl)					     Erlang Module Definition					      snmpa_local_db(3erl)

NAME

       snmpa_local_db - The SNMP built-in database

DESCRIPTION

       The  module snmpa_local_db contains functions for implementing tables (and variables) using the SNMP built-in database. The database exists
       in two instances, one volatile and one persistent. The volatile database is implemented with ets. The persistent  database  is  implemented
       with dets.

       There is a scaling problem with this database.

	 * Insertions and deletions are inefficient for large tables.

       This problem is best solved by using Mnesia instead.

       The  following  functions  describe the interface to snmpa_local_db . Each function has a Mnesia equivalent. The argument NameDb is a tuple
       {Name, Db} where Name is the symbolic name of the managed object (as defined in the MIB), and Db is either volatile or persistent .  mnesia
       is not possible since all these functions are snmpa_local_db specific.

COMMON DATA TYPES

       In the functions defined below, the following types are used:

	 * NameDb = {Name, Db}

	 * Name = atom(), Db = volatile | persistent

	 * RowIndex = [int()]

	 * Cols = [Col] | [{Col, Value}], Col = int(), Value = term()

       where RowIndex denotes the last part of the OID, that specifies the index of the row in the table. Cols is a list of column numbers in case
       of a get operation, and a list of column numbers and values in case of a set operation.

EXPORTS

       dump() -> ok | {error, Reason}

	      Types  Reason = term()

	      This function can be used to manually dump the database to file.

       match(NameDb, Pattern)

	      Performs an ets/dets matching on the table. See Stdlib documentation, module ets, for a description of Pattern and the  return  val-
	      ues.

       print()
       print(TableName)
       print(TableName, Db)

	      Types  TableName = atom()

	      Prints  the  contents  of  the database on screen. This is useful for debugging since the STANDARD-MIB and OTP-SNMPEA-MIB (and maybe
	      your own MIBs) are stored in snmpa_local_db .

	      TableName is an atom for a table in the database. When no name is supplied, the whole database is shown.

       table_create(NameDb) -> bool()

	      Creates a table. If the table already exist, the old copy is destroyed.

	      Returns false if the NameDb argument is incorrectly specified, true otherwise.

       table_create_row(NameDb, RowIndex, Row) -> bool()

	      Types  Row = {Val1, Val2, ..., ValN}
		     Val1 = Val2 = ... = ValN = term()

	      Creates a row in a table. Row is a tuple with values for all columns, including the index columns.

       table_delete(NameDb) -> void()

	      Deletes a table.

       table_delete_row(NameDb, RowIndex) -> bool()

	      Deletes the row in the table.

       table_exists(NameDb) -> bool()

	      Checks if a table exists.

       table_get_row(NameDb, RowIndex) -> Row | undefined

	      Types  Row = {Val1, Val2, ..., ValN}
		     Val1 = Val2 = ... = ValN = term()

	      Row is a tuple with values for all columns, including the index columns.

SEE ALSO

       ets(3erl), dets(3erl), snmp_generic(3erl)

Ericsson AB							     snmp 4.19						      snmpa_local_db(3erl)