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传感器组件 · App Inventor 2 中文网
...件仅适用于应用程序的 Screen1 主屏幕！！
属性
最新消息
返回最近接收到的标签的内容。
启用读值模式
指定 NFC 硬件是否在读取模式下运行。读取模式 (真) 或 写入模式（假）。
写入文本
指定在写入模式下将要写入...
Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification
... Great stuff. Only thing is: I had to use latest openssl 1.0.Xx for some reason, old 9.X.Xx wasn't working.
– zbstof
Jun 13 '17 at 20:13
1
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git - Find commit where file was added
...ok/en/v2/Git-Tools-Debugging-with-Git
For example,
git blame -L 174,190 xx.py
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Better way to set distance between flexbox items
...gin, bootstrap uses padding for its cols.
.row {
margin:0 -15px;
}
.col-xx-xx {
padding:0 15px;
}
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Unicode与UTF-8互转(C语言实现) - C/C++ - 清泛网 - 专注C/C++及内核技术
... 1 | 0000 0000 - 0000 007F | 0xxxxxxx
2 | 0000 0080 - 0000 07FF | 110xxxxx 10xxxxxx
3 | 0000 0800 - 0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
4 | 0001 0000 - 0010 FFFF | ...
PermGen elimination in JDK 8
...objects
Metaspace Tuning
The maximum metaspace size can be set using the -XX:MaxMetaspaceSize flag, and the default is unlimited, which means that only your system memory is the limit. The -XX:MetaspaceSize tuning flag defines the initial size of metaspace If you don’t specify this flag, the Meta...
How to build a query string for a URL in C#?
... not standard-compliant for multibyte characters. It will encode them as %uXXXX instead of %XX%XX. Resulting query strings may be incorrectly interpreted by web servers. This is even documented in internal framework class HttpValueCollection that is returned by HttpUtility.ParseQueryString() . Comme...
Django migration strategy for renaming a model and relationship fields
...igration(migrations.Migration):
dependencies = [
('myapp', '00XX_the_migration_of_myapp_with_renamemodel_foo_bar'),
('myotherapp', '00xx_the_migration_of_myotherapp_with_integerfield'),
]
operations = [
migrations.AlterField(
model_name='anothermodel...
How to set the maximum memory usage for JVM?
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Pretty sure you can control it via -XX:MaxDirectMemorySize. Not that I've profiled heavily to make sure but still ;)
– alexandergunnarson
Feb 2 '17 at 16:37
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How would I get a cron job to run every 30 minutes?
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@Adam Hawes: I've also used */xx with success in the past, but on Linux and other UNIXes. I've not personally tried Mac OSX. The original question didn't say which OS. Some older UNIXes don't support */xx
– Eddie
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