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Android系统级推送原理详解：为什么App被杀也能收到通知？ - App应用开发 -...
本文是"App Inventor 2 推送通知调研"系列的第三篇
相关帖子：AI2能否实现后台推送？源码级深度调研 | Supabase扩展Realtime能力分析
很多开发者都好奇：微信、淘宝这些 App，明明已经被我从后台杀掉了，为什么还能收到...
On localhost, how do I pick a free port number?
...figure out which port is available? I assume I cannot listen on port 80 or 21?
5 Answers
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Does pandas iterrows have performance issues?
...der of precedence for performance of various operations:
1) vectorization
2) using a custom cython routine
3) apply
a) reductions that can be performed in cython
b) iteration in python space
4) itertuples
5) iterrows
6) updating an empty frame (e.g. using loc one-row-at-a-time)
Using a cu...
Batch script loop
I need to execute a command 100-200 times, and so far my research indicates that I would either have to copy/paste 100 copies of this command, OR use a for loop, but the for loop expects a list of items, hence I would need 200 files to operate on, or a list of 200 items, defeating the point.
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When & why to use delegates? [duplicate]
...
286
I agree with everything that is said already, just trying to put some other words on it.
A de...
What is the difference between packaged_task and async
...~future blocks:
std::async(do_work1); // ~future blocks
std::async(do_work2); // ~future blocks
/* output: (assuming that do_work* log their progress)
do_work1() started;
do_work1() stopped;
do_work2() started;
do_work2() stopped;
*/
So if you want real asynchronous you need to k...
Highlight all occurrence of a selected word?
...
206
In Normal mode:
:set hlsearch
Then search for a pattern with the command / in Normal mode, ...
How can I delete all of my Git stashes at once?
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2557
The following command deletes all your stashes:
git stash clear
From the git documentation:
...
MySQL “WITH” clause
...ons-in-mysql-ctes/
Below is my earlier answer, which I originally wrote in 2008.
MySQL 5.x does not support queries using the WITH syntax defined in SQL-99, also called Common Table Expressions.
This has been a feature request for MySQL since January 2006: http://bugs.mysql.com/bug.php?id=16244
Oth...