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Created by James on January 10, 2011 12:35:53
Last update: November 04, 2011 19:28:03
The events mouseover and mouseout are fired when the mouse enters/leaves the element where the event handlers are registered, and any nested elements which do not handle these events (because of event bubbling ). The events mouseenter and mouseleave are fired only when the mouse enters/leaves the specified element. Nested elements do not come into play. This following is a test page. You need Firebug to view the console output. Or use the JavaScript Executor bookmarklet. If none of these are available, an alert will popup (but you won't be able to fully test with alert.).
<!DOCTYPE HTML> <html> <head> <title>jQu... For the above test page, when you move the mouse through both the outer and inner areas of the mouseover/mouseout rectangle, the output is...
Created by freyo on June 30, 2011 11:15:48
Last update: June 30, 2011 11:15:48
Install APK with adb :
$ platform-tools/adb install out/target/product/ge...
Error message in logcat:
D/PackageParser( 60): Scanning package: /data/ap...
The error was created by android.content.pm.PackageParser , which compares the android:minSdkVersion and android:targetSdkVersion attributes of the uses-sdk element of AndroidManifest.xml in the APK file against the SDK version of the device or emulator. The SDK version on the device has to be greater than that required by android:minSdkVersion .
In my case, since I built the package with AOSP, the target emulator has to be AOSP also. This is the relavant section in AndroidManifest.xml :
<uses-sdk android:minSdkVersion="AOSP"
...
And the relevant section in android.content.pm.PackageParser :
if (minCode != null) {
if (!minCode.equals(...
Created by jinx on May 04, 2011 19:39:44
Last update: May 04, 2011 19:42:51
The function include includes the specified file multiple times, while include_once only includes the file once.
This is a test:
Create file test.php with contents:
<?php
for ($i = 0; $i < 5; $i++) {
inclu...
Create file test.inc with contents:
<?php
echo __FILE__, " included: $i\n";
?>
...
Run test.php , the output is:
E:\phpwork\test.inc included: 0
E:\phpwork\test...
Change include to include_once , only one line is printed:
E:\phpwork\test.inc included: 0
You must use include_once to avoid duplicate includes in the case A includes B and C , but B and C both includes D .
The relationship between require and require_once is the same.
Created by Dr. Xi on April 20, 2011 21:44:15
Last update: May 02, 2011 20:56:58
The String.format() method provides versatile formatting capabilities. This tutorial tries to present these capabilities in a accessible manner. The format string A format string can contain zero, one, or more format specifiers . The general form of a format specifier is:
%[argument_index$] [flags] [width] [.precision]co... where things in square brackets are optional, and conversion is a character indicating the conversion to be applied to the corresponding variable value. The only required characters in the format specifier is the percent sign % and the conversion character. A simple example: public static void simpleFormat() { System.out... The Argument index The argument index is specified by a number, terminated by the dollar sign $ . The same argument may be repeated multiple times in a format string. Unindexed...
Created by jinx on April 20, 2011 08:59:07
Last update: April 20, 2011 08:59:30
You get this warning when timezone is not set (which is the default):
PHP Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EDT/-4.0/DST' instead in test.php on line 8
To get rid of the warning message, set timezone in php.ini :
;;;;;;;;;;;;;;;;;;;
; Module Settings ;
;;;;...
Created by Dr. Xi on April 05, 2011 08:04:37
Last update: April 05, 2011 08:11:37
There's no difference between a Java HTTP client and a Java HTTPS client. Ignore JavaWorld Java Tip 96 , it's way too old. The following code gets an HTTP page as well as an HTTPS page.
import java.io.*;
import java.net.*;
pub...
There's one catch . If you are using the code on a test server with a self-signed certificate, it fails. In that case, I would suggest that you download the certificate from the server and import it to your keystore as a trusted key. You may also need to add a subject alternative name to the certificate if the host name does not match the certificate.
You may also choose to use a custom TrustManager and HostnameVerifier to ignore the certificate verification errors.
Created by Dr. Xi on March 28, 2011 11:11:33
Last update: March 28, 2011 11:13:21
grep is a versatile command with many variations (grep, egrep, fgrep, then various implementations). It uses a regula expression (regex) pattern to filter input. But then there are basic and extended flavors of regex - leading to even more confusion. And, beware that there are lots of bad examples of regex in the wild... There are two critical questions to ask when you use grep: which grep implementation are you using? what is the flavor of the regex? Here are some examples for gnu grep v2.7:
# Find all numbers (no decimal point), basic regex... Use the -o flag to show only the matching part instead of the whole matching line: grep -o -E '\b[0-9]{2}\b' The good thing about the gnu grep is that it...
Created by James on May 07, 2010 04:13:14
Last update: May 07, 2010 04:35:03
It seems that the key to aligning a checkbox with its label lies in the line-height property of the label. This simple HTML snippet aligns well:
<!DOCTYPE HTML> <html> <head> <style typ... which is rendered like this: Change the font size of the label to 12px throws off the alignment: label.checkbox { font-size: 12px; di... In case 1, the height of the checkbox is 13px with 3px top and bottom margin, for a total of 19px , which is exactly the height of the label div. As can be seen from Firebug : Checkbox layout Label layout In case 2, the height of the label div shrinks to 15px , while the height of the checkbox remains the same: Checkbox layout Label layout And...
Created by Dr. Xi on January 07, 2010 23:40:28
Last update: February 09, 2010 03:24:35
This is a utility to generate SQL insert statements for Oracle for one table, or a set of tables. It doesn't cover all possibilities but should be good enough for most cases.
import java.io.*;
import java.sql.*;
import ...
To generate insert statements for multiple tables, simply put the table names in a file, one per line, and use the -f switch.
Created by Dr. Xi on November 19, 2008 00:22:27
Last update: January 07, 2010 23:00:36
There is a open source project named [ini4j] for processing Windows .ini configuration files. However, I found it an overkill for my purposes. So here is my simple implementation of a .ini parser. It mimics the standard java.util.Properties class with enhancements to get and set properties by section name. There are only a few simple rules: Leading and trailing spaces are trimmed from section names, property names and property values. Section names are enclosed between [ and ] . Properties following a section header belong to that section Properties defined before the appearance of any section headers are considered global properties and should be set and get with no section names. You can use either equal sign ( = ) or colon ( : )...
