大约有 31,840 项符合查询结果（耗时：0.0269秒） [XML]
How to select bottom most rows?
...urn rows in A->Z order, but select the top 200 in Z->A order this is one way to do it. The other answers, suggesting just changing the ORDER BY will not return the same results described in the question, as they will be out of order (unless order doesn't matter, which the OP did not say).
...
What are deferred objects?
... of any synchronous or asynchronous function.
Deferred Methods:
deferred.done()
Add handlers to be called when the Deferred object is resolved.
deferred.fail()
Add handlers to be called when the Deferred object is rejected.
deferred.isRejected()
Determine whether a Deferred object has been r...
Change application's starting activity
...you use the AndroidManifest.xml file. You can actually even have more than one launcher activity specified in your application manifest. To make an activity seen on the launcher you add these attributes to your activity in the manifest:
<intent-filter>
<action android:name="android.int...
Compelling examples of custom C++ allocators?
...note that have been some historic issues with TBB freeing stuff created on one thread in another thread (apparently a classic problem with thread private heaps and producer-consumer patterns of allocation & deallocation. TBB claims it's allocator avoids these issues but I have seen otherwise. ...
How do I revert a Git repository to a previous commit?
...ts
If, on the other hand, you want to really get rid of everything you've done since then, there are two possibilities. One, if you haven't published any of these commits, simply reset:
# This will destroy any local modifications.
# Don't do it if you have uncommitted work you want to keep.
git rese...
What are bitwise shift (bit-shift) operators and how do they work?
... not undefined, though; the standard requires implementations to define it one way or another. However, left shifts of negative signed numbers is undefined behaviour (signed integer overflow). So unless you need arithmetic right shift, it's usually a good idea to do your bit-shifting with unsigned...
How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
... in array
for i in $n_procs; do
./procs[${i}] &
pids[${i}]=$!
done
# wait for all pids
for pid in ${pids[*]}; do
wait $pid
done
share
|
improve this answer
|
...
Which version of PostgreSQL am I running?
... @Timo, this is a query to be run through PostgreSQL. This could be done through pgAdmin, or any other mechanism for running a query. Were you trying to run it from an Ubuntu shell? (this won't work)
– Highly Irregular
Jul 10 '14 at 2:31
...
MySQL - UPDATE multiple rows with different values in one query
...ssumes that the user_rol, cod_office combination is a primary key. If only one of these is the primary key, then add the other field to the UPDATE list.
If neither of them is a primary key (that seems unlikely) then this approach will always create new records - probably not what is wanted.
However...
What are the best practices for catching and re-throwing exceptions?
...ss you intend to do something meaningful.
"Something meaningful" might be one of these:
Handling the exception
The most obvious meaningful action is to handle the exception, e.g. by displaying an error message and aborting the operation:
try {
$connect = new CONNECT($db, $user, $password, $d...