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Full Discussion: Perl: One action if an element doesn't exist in array
Top Forums Shell Programming and Scripting Perl: One action if an element doesn't exist in array Post 302487100 by ahmed_zaher on Tuesday 11th of January 2011 11:07:03 AM
Old 01-11-2011
Perl: One action if an element doesn't exist in array
Hello,


I want to run one (not multiple) action if an element doesn't exist in array.
for example:

Code:
@array = (1..10);
foreach $el (@array)
{
 if ($el != 11)
 {
  print "number not found\n";
 } 
}

the output of this simple script:
Code:
number not found
number not found
number not found
number not found
number not found
number not found
number not found
number not found
number not found
number not found

But what I want to do is printing only one "number not found" or on other words, run one action if number doesn't exist in the array.

Thanks in advance.
Ahmed
 

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LEARN ABOUT CENTOS

avahi-dnsconfd.action

avahi-dnsconfd.action(8)				      System Manager's Manual					  avahi-dnsconfd.action(8)

NAME

       avahi-dnsconfd.action - avahi-dnsconfd action script

SYNOPSIS

       /home/lennart/tmp/avahi/etc/avahi/avahi-dnsconfd.action

DESCRIPTION

       avahi-dnsconfd.action  is  the  action  script  that is called whenever a new unicast DNS server is found or removed by avahi-dnsconfd. The
       default script as shipped with avahi patches /etc/resolv.conf to reflect the changed unicast DNS server configuration.

PARAMETERS

       argv[1] Contains the character "+" if the DNS server is new, "-" when it shall be removed from the DNS server list.

       argv[2] The IP address of the DNS server.

       argv[3] Numerical network interface number this DNS server was found on.

       argv[4] Numerical protocol number this DNS server was found on. (usually 2 for IPv4 and 10 for IPv6)

ENVIRONMENT

       AVAHI_INTERFACE Contains the textual interface name the corresponds with argv[3]. (e.g. "eth0")

       AVAHI_INTERFACE_DNS_SERVERS Contains a list of all DNS servers that avahi-dnsconfd found on the interface  $AVAHI_INTERFACE,  separated	by
       spaces.

       AVAHI_DNS_SERVERS Contains a list of all DNS server that avahi-dnsconfd found on all interfaces, separated by spaces.

AUTHORS

       The Avahi Developers <avahi (at) lists (dot) freedesktop (dot) org>; Avahi is available from http://avahi.org/

SEE ALSO

       avahi-dnsconfd(8), avahi-daemon(8)

COMMENTS

       This man page was written using xml2man(1) by Oliver Kurth.

Manuals 							       User						  avahi-dnsconfd.action(8)
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