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Created by James on November 01, 2012 13:51:42
Last update: November 01, 2012 13:51:42
One way to vertically center a line of text in a container div is to set line-height to be the same as the height of the container. But that requires specifying line-height in pixels. This technique avoids that.
<!doctype html>
<html>
<head>
<style typ...
Created by James on September 21, 2012 12:18:10
Last update: September 21, 2012 12:23:07
When one element overlaps another, which one gets the event when you click on it? The top one, of course! Not so for IE. If the top element is transparent, the click falls through on areas in the bottom element where there's "content".
Try the simple HTML below. When you click on the letter "A", the bottom DIV gets the event in IE.
<!doctype html>
<html>
<head>
<style ...
There's a CSS property pointer-events which controls click through behavior in case of overlay, but it doesn't have any effect in IE.
Created by James on September 20, 2012 10:22:58
Last update: September 20, 2012 10:22:58
This is a simple jQuery placeholder plugin that can be used on both text and password fields. I've been using the Mathias Bynens plugin for a while and it has been quite useful. I decided to create my own plugin because of two problems: The interaction between the Mathias Bynens plugin and jQuery validation can be quite intricate. Placeholder text is lost once the input field gets focus. This can be a problem when I want to auto-focus on a field, say user id on a log in form. I must mention that although it worked for me, this plugin has not been thoroughly tested. Feel free to provide feedback if you see problems.
(function($) { $.fn.placeholder = function(... Since it uses absolute positioning, you...
Created by voodoo on May 22, 2012 12:26:41
Last update: September 12, 2012 19:09:22
My program core dumped but there was no core file. The problem was that the core file size was 0:
$ ulimit -a
core file size (blocks, -c...
Use ulimit to enable it:
$ sudo bash
# ulimit -c unlimited
Actually, you can update the limit for yourself without root. You can put the ulimit command in .bashrc .
Created by James on August 01, 2012 14:26:53
Last update: August 01, 2012 14:26:53
The jQuery size() function returns the number of elements in the jQuery object.
According to jQuery doc:
The .size() method is functionally equivalent to the .length property; however, the .length property is preferred because it does not have the overhead of a function call.
Created by Captain on November 22, 2010 04:34:37
Last update: July 22, 2012 20:36:26
HDTV modeline example:
1920x1080 148.5 1920 2008 2052 2200 1080 1084 1088...
MythTV modeline database: http://www.mythtv.org/wiki/Modeline_Database
<!DOCTYPE html>
<html>
<head>
<style ...
Reference:
Custom Resolutions on Intel Graphics
Created by voodoo on July 04, 2012 14:34:42
Last update: July 04, 2012 15:29:47
Sample C program to read the whole stdin input into a char buffer until EOF:
#include <stdio.h>
#include <stdlib.h>
#incl...
Created by Dr. Xi on May 25, 2012 15:47:34
Last update: May 25, 2012 15:49:33
Steps to configure SSL for Apache HTTPD server on Windows:
In Apache2.2/conf/httpd.conf , load mod_ssl and include httpd-ssl.conf :
LoadModule ssl_module modules/mod_ssl.so
...
In Apache2.2/conf/extra/httpd-ssl.conf , make sure the paths for the cert files point to the cert and key you want to use:
# Server Certificate:
# Point SSLCertificat...
Start up Apache. If it fails, use the command line to see what the error is. There won't be any log in error.log if there are errors in the conf files:
C:\Program Files (x86)\Apache Software Foundation\...
I corrected the previous error by using the alternative line for SSLSessionCache :
# Inter-Process Session Cache:
# Configure ...
Created by Fang on March 06, 2012 12:25:33
Last update: March 06, 2012 12:25:33
In the bean validation API javadoc, for every constraint annotation, there's a corresponding .List annotation. For example, for @NotNull , there's @NotNull.List , for which JavaDoc says: Defines several @NotNull annotations on the same element What would you accomplish with multiple @NotNull annotations that you cannot accomplish with one @NotNull ? This is a test to reveal some of the facts. Change the Person class to:
package com.example; public class Person { ... Add another JUnit test ( src/test/com/example/TestPersonWithList.java ): package com.example; import java.util.Itera... As the test shows, a Person bean can never be valid because we are requiring that name must begin with Mr and Ms . One might think that the same can be accomplished by simply repeating the @Pattern annotation multiple times,...
Created by Fang on March 06, 2012 12:24:53
Last update: March 06, 2012 12:24:53
Validation groups can be used to control which rules validation rules to run. A validation group can be identified by any Java interface (not class!). Multiple validation groups may be specified when validating.
In this example, I added a validation group named MyValidationGroup ( src/main/java/com/example/MyValidationGroup.java in Maven project):
package com.example;
public interface MyVal...
and added a @Size rule for a person's name, because my database can only store up to 15 characters for a person's name:
package com.example;
import javax.validatio...
Now validate Person with a JUnit test ( src/test/java/com/example/TestPersonWithGroup.java in Maven project):
package com.example;
import java.util.Set;
...
Test with " mvn clean test ". The rules where groups is not specified, which belong to the javax.validation.groups.Default group, are not executed with these tests.
