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Twitter Bootstrap - how to center elements horizontally or vertically
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Demo Bootstrap 4 Horizontal Centering
For vertical centering in BS4 see https://stackoverflow.com/a/41464397/171456
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Hiding elements in responsive layout?
...4-alpha.getbootstrap.com/layout/responsive-utilities/
On Bootstrap 4.3.x: https://getbootstrap.com/docs/4.3/utilities/display/
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Rails layouts per action?
..._action [:new, :create] => "some_layout", :index => "other_layout"
https://github.com/barelyknown/layout_by_action
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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...集群的数量为偶数也是可以运行的，参考这个文章http://www.itpub.net/thread-1740982-1-1.html。后来突然看了一篇stackoverflow的文章终于顿悟了，mongodb本身设计的就是一个可以跨IDC的分布式数据库，所以我们应该把它放到大的环境来看。
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What does inverse_of do? What SQL does it generate?
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After this pr (https://github.com/rails/rails/pull/9522) inverse_of is not required in most cases.
Active Record supports automatic identification for most associations with standard names. However, Active Record will not automatically ide...
How do I determine if a port is open on a Windows server? [closed]
...tioning "Test-Connection" from PowerShell Core, or the shortcut "tnc". See https://twitter.com/david_obrien/status/1214082339203993600 and help me edit this answer to improve it please!
(If you have a PSVersion < 4.0, you're out of luck. Check this table:
Even though you can upgrade your ve...
JavaFX Application Icon
...new Image("/path/to/javaicon.png"));
OR
stage.getIcons().add(new Image("https://example.com/javaicon.png"));
Hope it helps. Thanks!!
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“The remote certificate is invalid according to the validation procedure.” using Gmail SMTP server
...hich may allow your encrypted message to be read by an attacker
// https://stackoverflow.com/a/14907718/740639
ServicePointManager.ServerCertificateValidationCallback =
delegate (
object s,
X509Certificate certificate,
X509C...
Windows batch: echo without new line
...white space may be stripped
Leading = causes a syntax error.
See http://www.dostips.com/forum/viewtopic.php?f=3&t=4209 for more information.
jeb posted a clever solution that solves most of the problems at Output text without linefeed, even with leading space or = I've refined the method so ...
Accessing MP3 metadata with Python [closed]
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check this one out:
https://github.com/Ciantic/songdetails
Usage example:
>>> import songdetails
>>> song = songdetails.scan("data/song.mp3")
>>> print song.duration
0:03:12
Saving changes:
>>> import son...