大约有 22,535 项符合查询结果（耗时：0.0400秒） [XML]
Default value for field in Django model
...
Set editable to False and default to your default value.
http://docs.djangoproject.com/en/stable/ref/models/fields/#editable
b = models.CharField(max_length=7, default='0000000', editable=False)
Also, your id field is unnecessary. Django will add it automatically.
...
Post parameter is always null
...The official ASP.NET site was updated today with an excellent explanation: https://docs.microsoft.com/en-us/aspnet/web-api/overview/advanced/sending-html-form-data-part-1
In a nutshell, when sending a single simple type in the body, send just the value prefixed with an equal sign (=), e.g. body:
=...
Good reasons to prohibit inheritance in Java?
...
you might want to make immutable objects (http://en.wikipedia.org/wiki/Immutable_object), you might want to create a singleton (http://en.wikipedia.org/wiki/Singleton_pattern), or you might want to prevent someone from overriding the method for reasons of efficiency,...
IE7 Z-Index Layering Issues
...label> <input>
</div>
</body>
</html>
See http://www.brenelz.com/blog/2009/02/03/squish-the-internet-explorer-z-index-bug/ for a similar example of this bug. The reason giving a parent element (envelope-1 in your example) a higher z-index works is because then all c...
When and why JPA entities should implement Serializable interface?
...over-the-wire (serialize them to some other representation), store them in http session (which is in turn serialized to hard disk by the servlet container), etc.
Just for the sake of persistence, Serializable is not needed, at least with Hibernate.
But it is a best practice to make them Serializabl...
How to Sign an Already Compiled Apk
...
Automated Process:
Use this tool (uses the new apksigner from Google):
https://github.com/patrickfav/uber-apk-signer
Disclaimer: Im the developer :)
Manual Process:
Step 1: Generate Keystore (only once)
You need to generate a keystore once and use it to sign your unsigned apk.
Use the keyto...
ListBox vs. ListView - how to choose for data binding
...e able to search/sort/filter based on user input. The data binding demo ( http://msdn.microsoft.com/en-us/library/ms771319.aspx ) uses a ListBox with a CollectionViewSource.
...
How do I measure the execution time of JavaScript code with callbacks?
...prints the contents of a text file called "output.txt":
var debug = true;
http.createServer(function(request, response) {
if(debug) console.log("----------------------------------");
if(debug) elapsed_time("recieved request");
var send_html = function(err, contents) {
if(debug...
default select option as blank
...he server:
<option label=" "></option>
Verified validity on http://validator.w3.org/check
Verified behavior with Win7(IE11 IE10 IE9 IE8 FF35 Safari5.1) Ubuntu14.10(Chrome40, FF35) OSX_Yosemite(Safari8, Chrome40) Android(Samsung-Galaxy-S5)
The following also passes validation today, ...
Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
...trip all namespaces
root = it.root
This is based on the discussion here:
http://bugs.python.org/issue18304
Update: rpartition instead of partition makes sure you get the tag name in postfix even if there is no namespace. Thus you could condense it:
for _, el in it:
_, _, el.tag = el.tag.rpar...