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How to generate a random number between a and b in Ruby?
...a..b)
http://www.rubyinside.com/ruby-1-9-3-introduction-and-changes-5428.html
Converting to array may be too expensive, and it's unnecessary.
(a..b).to_a.sample
Or
[*a..b].sample
Array#sample
Standard in Ruby 1.8.7+.
Note: was named #choice in 1.8.7 and renamed in later versions.
But ...
What's the difference between QMainWindow, QWidget and QDialog?
...5) can be seen at doc.qt.io/qt-5/qtwidgets-mainwindows-application-example.html
– Caleb Huitt - cjhuitt
Jun 1 at 0:59
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Elegant setup of Python logging in Django
... 'class': 'django.utils.log.AdminEmailHandler',
'include_html': True,
}
},
'loggers': {
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': True,
},
'apps': { # I keep all my of ...
slf4j: how to log formatted message, object array, exception
...at the top of the Logger javadoc class: slf4j.org/apidocs/org/slf4j/Logger.html
– Adam Gent
Apr 20 '13 at 20:43
...
CMFCTabCtrl的使用、颜色样式调整 - C/C++ - 清泛网 - 专注C/C++及内核技术
...拽
From：http://www.cnblogs.com/magic-cube/archive/2011/04/27/2029908.html
tsingfun.com补充：
设置AutoColor后的Tab效果如图：
MDI默认Tab样式改为上图效果的代码如下（MainFrm.cpp）：
//CMDITabInfo mdiTabParams;
//mdiTabParams.m_style = CMFCTabCtrl::STYLE_3D...
What is the best regular expression to check if a string is a valid URL?
...nalized) pattern to comply with RFC 3987 (http://www.faqs.org/rfcs/rfc3987.html). These are in PCRE syntax.
For absolute IRIs (internationalized):
/^[a-z](?:[-a-z0-9\+\.])*:(?:\/\/(?:(?:%[0-9a-f][0-9a-f]|[-a-z0-9\._~\x{A0}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFEF}\x{10000}-\x{1FFFD}\x{20000}-\x{2...
Is file append atomic in UNIX?
...
Where exactly in .../write.html? For O_APPEND, I see no mention of PIPE_BUF, and I see promise that "no intervening file modification operation shall occur between changing the file offset and the write operation", but I'm not that sure if this means t...
Difference between BYTE and CHAR in column datatypes
... on the encoding.
See also http://www.joelonsoftware.com/articles/Unicode.html
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...！
来自中文网文档：https://www.fun123.cn/reference/iot/ble.html
可以获得到广播数据吗?可以获得到广播数据吗?可以接收广播数据：https://www.fun123.cn/reference/ ... l#AdvertisementData
感谢分享学习了，点赞感谢分享
How to plot two columns of a pandas data frame using points?
...ydata.org/pandas-docs/version/0.23/generated/pandas.DataFrame.plot.scatter.html
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