12-12-2002
Check out the man page on the sort command. You may want to sort first by the last field (to get all the same usernames together) and then use the -um option to sort again for the date/time field. All the oldest entries for each name should be the last (a loop could grap the last entry and send it to your program).
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LEARN ABOUT DEBIAN
mail::rfc822::address
Address(3pm) User Contributed Perl Documentation Address(3pm)
NAME
Mail::RFC822::Address - Perl extension for validating email addresses according to RFC822
SYNOPSIS
use Mail::RFC822::Address qw(valid validlist);
if (valid("pdw@ex-parrot.com")) {
print "That's a valid address
";
}
if (validlist("pdw@ex-parrot.com, other@elsewhere.com")) {
print "That's a valid list of addresses
";
}
DESCRIPTION
Mail::RFC822::Address validates email addresses against the grammar described in RFC 822 using regular expressions. How to validate a user
supplied email address is a FAQ (see perlfaq9): the only sure way to see if a supplied email address is genuine is to send an email to it
and see if the user recieves it. The one useful check that can be performed on an address is to check that the email address is
syntactically valid. That is what this module does.
This module is functionally equivalent to RFC::RFC822::Address, but uses regular expressions rather than the Parse::RecDescent parser.
This means that startup time is greatly reduced making it suitable for use in transient scripts such as CGI scripts.
valid ( address )
Returns true or false to indicate if address is an RFC822 valid address.
validlist ( addresslist )
In scalar context, returns true if the parameter is an RFC822 valid list of addresses.
In list context, returns an empty list on failure (an invalid address was found); otherwise a list whose first element is the number of
addresses found and whose remaining elements are the addresses. This is needed to disambiguate failure (invalid) from success with no
addresses found, because an empty string is a valid list.
AUTHOR
Paul Warren, pdw@ex-parrot.com
CREDITS
Most of the test suite in test.pl is taken from RFC::RFC822::Address, written by Abigail, abigail@foad.org
COPYRIGHT and LICENSE
This program is copyright 2001-2002 by Paul Warren.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to
the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of
the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
SEE ALSO
RFC::RFC822::Address, Mail::Address
perl v5.10.1 2002-04-13 Address(3pm)