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VIP会员中心 · App Inventor 2 中文网，少儿编程陪伴者
...局域网内，原理是电脑端启动WEB服务器，手机AI伴侣与WEB通信；电脑连手机热点，也是OK的。 扫码关注网页底部公众号，观看置顶视频，AI伴侣的各种测试方式均有讲解。 ...
How to tell if browser/tab is active [duplicate]
... visible but an another window is active.
– Juha Syrjälä
Jul 25 '17 at 19:37
2
FYI: caniuse.co...
SQL, Postgres OIDs, What are they and why are they useful?
... unsigned integers. They are not unique–OID counter will wrap around at 2³²-1. OID are also used to identify data types (see /usr/include/postgresql/server/catalog/pg_type_d.h).
In my experience, the feature is generally unused in most postgres-backed applications (probably in part because they'...
How do I determine if a port is open on a Windows server? [closed]
...
Assuming that it's a TCP (rather than UDP) port that you're trying to use:
On the server itself, use netstat -an to check to see which ports are listening.
From outside, just use telnet host port (or telnet host:port on Unix systems) to see if ...
Are SVG parameters such as 'xmlns' and 'version' needed?
...wer made that mistake by refering to the XML, not the SVG specification in ³. I tried to correct it, but some idiotes rejected the edit.
– Bachsau
Dec 14 '18 at 2:50
...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...to peer connections from javascript, but these connections WILL NOT BE RAW TCP.
The complete spec can be found at http://dev.w3.org/html5/websockets/
jrh
EDIT: with specific reference to peer to peer connections, check out these links:
Regarding peer to peer connections: http://www.w3.org/TR/20...
Changing .gitconfig location on Windows
...red Oct 29 '10 at 10:57
Stefan NäweStefan Näwe
2,82611 gold badge1414 silver badges1919 bronze badges
...
How to get past the login page with Wget?
... You don't need -p (--page-requisites) for this.
– ændrük
Jan 6 '12 at 17:24
14
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Difference between StringBuilder and StringBuffer
...d Nov 18 '17 at 18:29
Raimund Krämer
1,03677 silver badges2626 bronze badges
answered Dec 10 '08 at 4:36
sblu...
What languages are Windows, Mac OS X and Linux written in?
...er in C, e.g. inheritance in driver code.
– Erik Alapää
Feb 23 '15 at 13:14
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