#!/bin/ksh93
# IBM_PROLOG_BEGIN_TAG 
# This is an automatically generated prolog. 
#  
# 61haes_r714 src/43haes/lib/ksh93/util/list/KLIB_UTIL_LIST_unique_key_list.sh 1.4 
#  
# Licensed Materials - Property of IBM 
#  
# Restricted Materials of IBM 
#  
# COPYRIGHT International Business Machines Corp. 2005,2011 
# All Rights Reserved 
#  
# US Government Users Restricted Rights - Use, duplication or 
# disclosure restricted by GSA ADP Schedule Contract with IBM Corp. 
#  
# IBM_PROLOG_END_TAG 
# @(#)11	1.4 src/43haes/lib/ksh93/util/list/KLIB_UTIL_LIST_unique_key_list.sh, hacmp, 61haes_r714 11/28/11 15:12:31
#
#=head1 NAME
#
# KLIB_UTIL_LIST_unique_key_list - Remove duplicates from a list
#
#=head1 SYNOPSIS
#
# typeset list="a b d e f b a a b"
# KLIB_UTIL_LIST_unique_key_list list
# echo $list
#
#=head1 DESCRIPTION
#
# Removes duplicate entries from a list
#
#=head1 ARGUMENTS
#
#   1: [by ref] list of elements to remove duplicates from
#
#=head1 RETURN
#
#   None
#
#=head1 COPYRIGHT
#
#(C) COPYRIGHT International Business Machines Corp. 2005
#All Rights Reserved
#
#=cut
#
function KLIB_UTIL_LIST_unique_key_list
{
  . /usr/es/lib/ksh93/func_include

  typeset -n list=$1
  typeset -A array

  while shift; (( $# )); do
    array[${1}]=:
  done

  list="${!array[*]}"
}