大约有 19,000 项符合查询结果（耗时：0.0498秒） [XML]
How to prevent multiple instances of an Activity when it is launched with different Intents
...tivities.
// we never want this to happen. Instead, we check if we are the root and if not, we finish.
if (!isTaskRoot()) {
final Intent intent = getIntent();
if (intent.hasCategory(Intent.CATEGORY_LAUNCHER) && Intent.ACTION_MAIN.equals(intent.getAction())) {
Log.w(LOG_TAG, "...
Converting an array of objects to ActiveRecord::Relation
...l as sorting them with a specific column(id for instance). Since I'm using MySQL, the field function could be helpful.
MyModel.where('id in (?)',ids).order("field(id,#{ids.join(",")})")
The SQL looks like:
SELECT ... FROM ... WHERE (id in (11,5,6,7,8,9,10))
ORDER BY field(id,11,5,6,7,8,9,10)
...
地图组件（高德地图） · App Inventor 2 中文网
...他位置，例如在屏幕外添加 标记，则可以使用“将地图重置为初始边界”按钮将 地图 重新置于起始位置的中心。
属性
自定义URL
支持XYZ格式的地图URL。XYZ格式是一种瓦片地图服务，将地图分成无数个小...
Vim and Ctags tips and tricks [closed]
...ill look in the current directory for "tags", and work up the tree towards root until one is found. IOW, you can be anywhere in your source tree instead of just the root of it.
share
...
Exceptions in .gitignore [duplicate]
...les working together in a hierarchical manner to achieve your goal.
At the root level you may have:
root
*.dll
inside the folder having the myfile.dll you can add another .gitignore file like so:
root/lib/folderwithMyFiledll
!myfile.dll
more info here
An optional prefix "!" which negates...
How to move up a directory with Terminal in OS X
...
cd / will get you to the root directory back
– Zip
Oct 26 '14 at 23:21
4
...
How to empty (clear) the logcat buffer in Android [duplicate]
...
The following command will clear only non-rooted buffers (main, system ..etc).
adb logcat -c
If you want to clear all the buffers (like radio, kernel..etc), Please use the following commands
adb root
adb logcat -b all -c
or
adb root
adb shell logcat -b all -c...
Where are sudo incidents reported? [closed]
...
Nevermind, I just found the answer in the alt-text at xkcd:
Replace root with your username, in my case ryan, so the log is found with:
cat /var/spool/mail/ryan
share
|
improve this answer
...
Why do I need Transaction in Hibernate for read-only operations?
...nsactions can be optimized by DBs, but this of course is DB specific. E.g. MySQL added support for this only in InnoDB starting from 5.6.4 version.
If you're not using JDBC directly, but rather an ORM, that might be problematic. For instance Hibernate community says that working outside of transacti...
Creating a singleton in Python
...r the task.
Here is a quote from http://googletesting.blogspot.com/2008/08/root-cause-of-singletons.html:
Now, there is one kind of Singleton which is OK. That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state, as everyt...