大约有 32,000 项符合查询结果（耗时：0.0427秒） [XML]
Using Regular Expressions to Extract a Value in Java
... answered Oct 25 '08 at 21:47
Allain LalondeAllain Lalonde
83.5k6666 gold badges172172 silver badges234234 bronze badges
...
How can I add a column that doesn't allow nulls in a Postgresql database?
... postgres doc offline by doing man ALTER_TABLE :)
– allan.simon
Oct 18 '15 at 19:49
@allan.simon I've never used Post...
Reverting single file in SVN to a particular revision
...
This probably does not actually do what the question asker wanted. Using this, the working copy is clean and cannot be committed AS IS, and an "svn update" without a version number specified will retrieve the latest, unwanted version.
...
How to delete a remote tag?
...r a branch and for a tag. If you want to make sure that you cannot accidentally remove the branch instead of the tag, you can specify full ref which will never delete a branch:
git push origin :refs/tags/tagname
If you also need to delete the local tag, use:
git tag --delete tagname
Background
Pu...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...web application? I would love to have an asynchronous webserver which will allow me to scale easly.
What solution will give the best performance / scalability / most useful framework (in terms of easy of use and easy of developing)?
...
What is the purpose of the reader monad?
...
Don't be scared! The reader monad is actually not so complicated, and has real easy-to-use utility.
There are two ways of approaching a monad: we can ask
What does the monad do? What operations is it equipped with? What is it good for?
How is the monad implemen...
JavaScript code to stop form submission
...
Just use a simple button instead of a submit button. And call a JavaScript function to handle form submit:
<input type="button" name="submit" value="submit" onclick="submit_form();"/>
Function within a script tag:
function submit_form() {
if (conditions) {
docu...
Understanding Canvas and Surface concepts
...nders these to the final display in their correct Z-order. A surface typically has more than one buffer (usually two) to do double-buffered rendering: the application can be drawing its next UI state while the surface flinger is compositing the screen using the last buffer, without needing to wait ...
What does the “static” modifier after “import” mean?
...on. Where the normal import
declaration imports classes from
packages, allowing them to be used
without package qualification, the
static import declaration imports
static members from classes, allowing
them to be used without class
qualification.
So when should you use static imp...
“A lambda expression with a statement body cannot be converted to an expression tree”
...e:
Think carefully when using this method, because this way, you will have all query result in memory, that may have unwanted side effects on the rest of your code.
share
|
improve this answer
...