Shell Programming and Scripting

#!/bin/ksh
echo "---------------------------------------------------"
        set -A ipaddr_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}' | uniq) #hosts ips
        set +A ipaddr_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}') 


        if [ "$os" = "solaris" ]
        then
                set +A ipaddr_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}')
        else
               #some other statement
        fi

        COUNT=0
        for str in ${ipaddr_arr[*]}
        do
                echo "$str"
                COUNT=$((COUNT+1))
        done

+A ipaddr_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}')

        set -A ipaddr_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}' | uniq) #hosts ips
        set -A other_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}') 


        if [ "$os" = "solaris" ]
        then
                set -A third_arr $(egrep -v '^#|^::|^$' /etc/hosts |awk '{print $1}')
        else
               #some other statement
        fi
   
       set -A ipaddr_arr ${ipaddr_arr[*]} ${other_arr[*]} ${third_arr[*]}
       #the above code snippet will append all other array values to the first ipaddr_arr