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Created by Dr. Xi on December 04, 2009 04:33:05
Last update: December 04, 2009 04:33:05
Variable Meaning $_ The default or implicit variable. @_ Within a subroutine the array @_ contains the parameters passed to that subroutine. $a, $b Special package variables when using sort() $<digit> Contains the subpattern from the corresponding set of capturing parentheses from the last pattern match, not counting patterns matched in nested blocks that have been exited already. $. Current line number for the last filehandle accessed. $/ The input record separator, newline by default. $| If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel. Default is 0 (regardless of whether the channel is really buffered by the system or not; $| tells you only whether you've asked Perl explicitly to flush after...
Created by Dr. Xi on July 28, 2009 19:00:55
Last update: July 28, 2009 19:03:57
When you install Apache with mod_ssl, an executable file openssl (or openssl.exe for Windows) is installed in /usr/local/ssl/bin (or %APACHE_HOME%/bin ). This utility is used to generate private key and certificate request:
Generate private key:
openssl genrsa -out server.key 1024
# or wi...
Generate certificate request:
openssl req -new -key server.key -out server.csr
...
Self-Sign Certificate:
openssl x509 -req -days 3650 -in server.csr -signk...
Apache configuration:
Listen 443
<VirtualHost *:443>
ServerNam...
In some configurations
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unc...
is used to work around MSIE bugs. See http://httpd.apache.org/docs/2.2/ssl/ssl_faq.html#msie for details.
Created by Dr. Xi on June 26, 2009 23:34:54
Last update: July 03, 2009 02:27:31
This registry key determines the number of bytes a sender may transmit without receiving an acknowledgment. If left unset, the default size is 8760 (2238 hex). For reliable networks, this size is almost always too small. I increased it to 65535 (FFFF hex) and my download speed for a big file increased from about 450Kbps to about 8Mbps!
Windows Registry Editor Version 5.00
[HKEY_...
Note:
This hack doesn't work for Windows Vista.
Created by Dr. Xi on May 22, 2009 18:58:41
Last update: May 22, 2009 18:58:41
import javax.crypto.Cipher;
import javax.crypto...
Created by Dr. Xi on May 02, 2009 21:25:35
Last update: May 02, 2009 22:07:40
Use the built-in dict function:
>>> dict([(1,2), (3,4), (5,6)])
{1: 2, 3: 4, 5:...
Or, if you have a list with even number of elements and want to use the odd numbered elements for key and even numbered elements for value:
>>> a = [ 'a', 1, 'b', 2, 'c', 3 ]
>>> dict([(a...
Created by Dr. Xi on April 30, 2009 23:26:13
Last update: May 01, 2009 17:08:49
ApplicationResources.properties contains these keys:
test.key.1 = Test Key One
test.key.2 = Test Key...
Struts (struts-el):
<%@ page contentType="text/html;charset=UTF-8" lan...
JSTL
<%@ page contentType="text/html;charset=UTF-8" lan...
However, the values for one and two must be passed in from pageScope , requestScope , sessionScope , etc. Values defined by struts bean:define are not interpreted.
Important:
JSTL tags work with servlet spec 2.4 only. So your web.xml must start with this:
<?xml version = '1.0' encoding = 'windows-1252'?> ...
Not this:
<?xml version = '1.0' encoding = 'windows-1252'?>
...
However, the latter does work with struts-el tags.
Created by Dr. Xi on March 24, 2009 23:40:51
Last update: March 24, 2009 23:41:34
The DECODE function is used to decode a key to a value , returning the default value if one is provided. It returns null if there's no match for keys and no default value is provided.
select DECODE(&quarter_id, '1', 'Spring', '2',...
Created by Dr. Xi on March 16, 2009 22:10:29
Last update: March 16, 2009 22:12:35
Generate the keys
$ ssh-keygen -t rsa
Generating public/private r...
Copy id_rsa.pub to the remote server.
scp .ssh/id_rsa.pub jmann@sleepy:/home/jmann/.ssh/
Logon to the remote host, append id_rsa.pub to authorized_keys . Make sure authorized_keys is writable
only by owner.
$ cd ~/.ssh
$ cat id_rsa.pub >>authorized_keys
...
For putty, you need to convert the private key to putty format using puttygen :
and tell it to use the private key:
Created by Dr. Xi on February 23, 2009 21:04:08
Last update: February 23, 2009 21:04:08
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" ...
Created by woolf on February 10, 2009 21:05:54
Last update: February 10, 2009 21:05:54
Press the "Windows" key
Press R to bring up the Run dialog
Enter tasks and hit Return.