大约有 30,000 项符合查询结果（耗时：0.0548秒） [XML]
Why are local variables not initialized in Java?
...ails, so will not be initialized, and so it will be an error to attempt to call so.CleanUp. Always enter the try section after you have acquired the resource that the finally section finalizes.
The try-finally block after the so initialization is there only to protect the SomeObject instance, to ma...
Select rows of a matrix that meet a condition
...personally find it useless.
I assume you have a data.frame, array, matrix called Mat with A, B, C as column names; then all you need to do is:
In the case of one condition on one column, lets say column A
Mat[which(Mat[,'A'] == 10), ]
In the case of multiple conditions on different column, yo...
Symbolic links and synced folders in Vagrant
... that appears to be wrong with their default value for rsync__args (specifically, that one of the default args, --copy-links, seems to be breaking another, --archive, at least as far as copying broken symlinks is concerned).
...
SQL Query to concatenate column values from multiple rows in Oracle
...t (with tag E)
extract the text of this
aggregate the xml (concatenate it)
call the resulting column "Result"
share
|
improve this answer
|
follow
|
...
When I catch an exception, how do I get the type, file, and line number?
...nError:
print(traceback.format_exc())
Output
Traceback (most recent call last):
File "/path/to/file.py", line 51, in <module>
print(4/0)
ZeroDivisionError: division by zero
Process finished with exit code 0
...
How do you execute an arbitrary native command from a string?
...the commandline). The eval things is half-joking because that's what it is called in so many other scripting languages, and this isn't the first question I've seen where someone had no idea about invoke-expression. And the OP's case sounds like in-house script only.
– Joel B Fa...
Is It Possible to Sandbox JavaScript Running In the Browser?
...r accidental damage or intrusion. The ADsafe subset can be verified mechanically by tools like JSLint so that no human inspection is necessary to review guest code for safety. The ADsafe subset also enforces good coding practices, increasing the likelihood that guest code will run correctly.
You ...
Attaching click event to a JQuery object not yet added to the DOM [duplicate]
...
Ok I thought so. The checkbox is added dynamically after an ajax call to the server, which responds with the info required to create it. I've done what you suggested and manipulated it after the input was added to the DOM.
– James Wierzba
...
Error in : object of type 'closure' is not subsettable
...unction and the environment that stores the variables when the function is called.
In this specific case, as Joshua mentioned, you are trying to access the url function as a variable. If you define a variable named url, then the error goes away.
As a matter of good practise, you should usually ...
Android LocationClient class is deprecated but used in documentation
...MainActivity extends Activity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private final String TAG = "MyAwesomeApp";
private TextView mLocationView;
private GoogleApiClient mGoogleApiClient;
...