大约有 2,500 项符合查询结果（耗时：0.0087秒） [XML]
在APP Inventor的BLE组件使用RequestMTU方法之后，发送的字符数依旧限制在2...
...里面修改MTU，返回的值是512，并且是修改成功的，但是在编程中使用RequestMTU方式设置512,，并且读取返回值也是512，然后调用方法WriteString发送字符串，字符串为80字节，但是蓝牙串口只能收到前20个字节的数据，怎么才能一次性...
请问各位前辈大佬关于APP熄灭屏幕后停止响应的问题。 - App Inventor 2 拓...
各位大佬好 我刚开始学习 APP INVENTOR编程。 尝试写了一个与MQTT服务器通讯的小程序。 这个小程序在手机当前程序状态运行正常 手机切换到别的应用 也运行正常。 但是 当手机屏幕熄灭 ， 刚熄灭的时候 还能正常接收MQTT的信...
How to compile and run C/C++ in a Unix console/Mac terminal?
How can I compile/run C or C++ in Unix console or a Mac terminal?
16 Answers
16
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^M at the end of every line in vim
...sy way to strip out the DOS line endings is to use the ff option:
:set ff=unix
:wq
Now your file is back to the good-old-Unix-way.
If you want to add the DOS line-endings (to keep a printer happy, or transfer files with Windows friends who don't have nice tools) you can go the opposite direction...
Add up a column of numbers at the Unix shell
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... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
Edit: added the - argument for portability, thanks @Dogbert and @Owen.
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How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
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:e ++ff=dos followed by :set ff=unix will convert the endings to a sane format.
– Mateen Ulhaq
Mar 2 '18 at 2:22
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Why number 9 in kill -9 command in unix? [closed]
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See the wikipedia article on Unix signals for the list of other signals. SIGKILL just happened to get the number 9.
You can as well use the mnemonics, as the numbers:
kill -SIGKILL pid
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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在编写此扩展之前，我从未进行过任何 Android 编程。我突然需要一款小型应用，这将是一次完美的学习体验。从小处着手，我遇到了 App Inventor 以及该平台的所有变体。经过一番研究，我得出结论，这将是一个不错的...
psql: FATAL: Peer authentication failed for user “dev”
...atabase user name
-h is the hostname/IP of the local server, thus avoiding Unix domain sockets
-d is the database name to connect to
This is then evaluated as a "network" connection by Postgresql rather than a Unix domain socket connection, thus not evaluated as a "local" connect as you might see ...
When should I use File.separator and when File.pathSeparator?
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You use separator when you are building a file path. So in unix the separator is /. So if you wanted to build the unix path /var/temp you would do it like this:
String path = File.separator + "var"+ File.separator + "temp"
You use the pathSeparator when you are dealing with a lis...