大约有 14,600 项符合查询结果（耗时：0.0243秒） [XML]
How to reset sequence in postgres and fill id column with new data?
...n't want to retain the ordering of ids, then you can
ALTER SEQUENCE seq RESTART WITH 1;
UPDATE t SET idcolumn=nextval('seq');
I doubt there's an easy way to do that in the order of your choice without recreating the whole table.
...
How to use git bisect?
...by half.
You'll use the command like this:
$ git stash save
$ git bisect start
$ git bisect bad
$ git bisect good 0
Bisecting: 2 revisions left to test after this (roughly 2 steps)
[< ... sha ... >] 3
After this command, git will checkout a commit. In our case, it'll be commit 3. You need ...
Frontend tool to manage H2 database [closed]
...rowse port 8082:
$ java -cp /opt/h2/bin/h2.jar org.h2.tools.Server -help
Starts the H2 Console (web-) server, TCP, and PG server.
Usage: java org.h2.tools.Server
When running without options, -tcp, -web, -browser and -pg are started.
Options are case sensitive. Supported options are:
[-help] or [...
Pan & Zoom Image
...enderTransformOrigin on the image is then set to 0.5,0.5 so the image will start zooming on the center of the image. The RenderTransform is also set to a TransformGroup containing a ScaleTransform and a TranslateTransform.
I then handled the MouseWheel event on the image to implement zooming
priva...
Polymorphism with gson
...json string with Gson.
I receive an array of commands. The command can be start, stop , some other type of command. Naturally I have polymorphism, and start/stop command inherit from command.
...
iPhone Simulator suddenly started running very slow
... I tried this but it does not seem to make any difference. I also tried restarting after toggling, but it is still very slow. Also the speed issue doesn't seem to be limited to animation.
– Finglish
Mar 11 '13 at 21:16
...
C# 'is' operator performance
...d) each test looks like the following
static void IsTest()
{
DateTime start = DateTime.Now;
for (int i = 0; i < 10000000; i++)
{
MyBaseClass a;
if (i % 2 == 0)
a = new MyClassA();
else
a = new MyClassB();
bool b = a is MyClassB;...
Get program execution time in the shell
...
#!/bin/bash
START=$(date +%s)
# do something
# start your script work here
ls -R /etc > /tmp/x
rm -f /tmp/x
# your logic ends here
END=$(date +%s)
DIFF=$(( $END - $START ))
echo "It took $DIFF seconds"
...
What does multicore assembly language look like?
...ocessor), the Bootstrap thread (usually thread 0 in core 0 in processor 0) starts up fetching code from address 0xfffffff0. All the other threads start up in a special sleep state called Wait-for-SIPI. As part of its initialization, the primary thread sends a special inter-processor-interrupt (IPI...
Checking if an Android application is running in the background
.... Just check if the number of stopped activities is equal to the number of started activities. If they're equal, your application is being backgrounded. If there are more started activities, your application is still visible. If there are more resumed than paused activities, your application is not ...