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Autowiring two beans implementing same interface - how to set default bean to autowire?
...ments DeviceDao
This way it will be selected as the default autowire candididate, with no need to autowire-candidate on the other bean.
Also, rather than using @Autowired @Qualifier, I find it more elegant to use @Resource for picking specific beans, i.e.
@Resource(name="jdbcDeviceDao")
DeviceDa...
What happens if a Android Service is started multiple times?
...so says there: "The startService() method returns immediately and the Android system calls the service's onStartCommand() method. If the service is not already running, the system first calls onCreate(), then calls onStartCommand()." So if the service is already running then the system will skip the...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
It is safe to say that the EAV/CR database model is bad. That said,
10 Answers
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What can , and be used for?
... parameters
The <f:viewParam> manages the setting, conversion and validation of GET parameters. It's like the <h:inputText>, but then for GET parameters.
The following example
<f:metadata>
<f:viewParam name="id" value="#{bean.id}" />
</f:metadata>
does basically th...
Send POST data using XMLHttpRequest
... Yes, but question was to write JavaScript equivalent of provided form not submit the form using JavaScript.
– uKolka
Jun 22 '13 at 17:07
3
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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
...不将其保存到已创建的组件列表中，因此它不会关联到 ID。请注意，你无法直接在 Screen 中创建组件，你需要事先在 Screen 中设置布局才能执行此操作。
将已创建组件的 ID...
How do I link a JavaScript file to a HTML file?
....js"></script>
<script> - tag is used to define a client-side script, such as a JavaScript.
type - specify the type of the script
src - script file name and path
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Why are dashes preferred for CSS selectors / HTML attributes?
In the past I've always used underscores for defining class and id attributes in HTML. Over the last few years I changed over to dashes, mostly to align myself with the trend in the community , not necessarily because it made sense to me.
...
Separation of business logic and data access in django
...cation. Your users will appreciate this :-)
Expressing Commands
Django provides two easy ways of expressing commands; they are both valid options and it is not unusual to mix the two approaches.
The service layer
The service module has already been described by @Hedde. Here you define a separate mod...
Run an Application in GDB Until an Exception Occurs
... which has the following ANSI C interface:
/* addr is where the exception identifier is stored.
id is the exception identifier. */
void __raise_exception (void **addr, void *id);
To make the debugger catch all exceptions before any stack unwinding takes place, set a breakpoint on __raise_exce...