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Can I have multiple primary keys in a single table?
...y one auto column and it must be defined as a key".
DROP TABLE IF EXISTS `test`.`animals`;
CREATE TABLE `test`.`animals` (
`grp` char(30) NOT NULL,
`id` mediumint(9) NOT NULL AUTO_INCREMENT,
`name` char(30) NOT NULL,
PRIMARY KEY (`grp`,`id`)
) ENGINE=MyISAM;
INSERT INTO animals (grp,name)...
PHP mail function doesn't complete sending of e-mail
...subject, $message, $headers); // $recipient should be $to
Another way to test this is to hard code the recipient value into the mail() function call:
mail('user@example.com', $subject, $message, $headers);
This can apply to all of the mail() parameters.
Send to multiple accounts
To help rule...
How to set session timeout in web.config
...te, you've set the session to be abandoned in 1 minute after its idle.
To test this, create a simple aspx page, and write this code in the Page_Load event,
Response.Write(Session.SessionID);
Open a browser and go to this page. A session id will be printed. Wait for a minute to pass, then hit ref...
How to convert List to List?
...List<string> sss = new List<string>(); IEnumerable<int> test1 = sss.Select<string, int>(x => Convert.ToInt32(x)); but this does not: IEnumerable<int> test2 = sss.Select<string, int>(Convert.ToInt32); The error is ambiguous call between the string,int,int and s...
How do you overcome the HTML form nesting limitation?
...tatement, you will be able to view the support for this feature here: html5test.com/compare/feature/form-association-form.html. IE is a write-off, most other desktop browsers seem tolerable.
– fatty
Dec 22 '13 at 3:57
...
What's the difference between equal?, eql?, ===, and ==?
... true if obj and other refer to the same hash key. This is used by Hash to test members for equality. For objects of class Object, eql? is synonymous with ==. Subclasses normally continue this tradition by aliasing eql? to their overridden == method, but there are exceptions. Numeric types, for exam...
How to create Drawable from resource
I have an image res/drawable/test.png (R.drawable.test).
I want to pass this image to a function which accepts Drawable , e.g. mButton.setCompoundDrawables() .
...
Mozilla PDF.js：PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...复制缺少的 API和API功能的行为。
09.pdf
test pdf
测试用的pdf文件
debugger.js
helpful pdf debugging features
images/
images for the viewer and annotation icons
viewer界面的图标
l10n.js
lo...
Why is null an object and what's the difference between null and undefined?
...undefined, null
Booleans: false
Numbers: +0, -0, NaN
Strings: ""
You can test the conversion to boolean by using Boolean as a function (normally it is a constructor, to be used with new):
> Boolean(null)
false
> Boolean("")
false
> Boolean(3-3)
false
> Boolean({})
true
> Boolean([]...
Get/pick an image from Android's built-in Gallery app programmatically
... works with OI file manager, astro file manager AND the media gallery too (tested). so i guess it will work with every file manager (are there many others than those mentioned?). did some corrections to the code he wrote.
public class BrowsePicture extends Activity {
//YOU CAN EDIT THIS TO ...