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Center a position:fixed element
... to the screen with a dynamic width and height. I used margin: 5% auto; for this. Without position: fixed; it centers fine horizontally, but not vertically. After adding position: fixed; , it's even not centering horizontally.
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转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ngda老大的资料安装成功postfix（地址在这里http://www.extmail.org/forum/archive/2/0510/563.html）。现在把我安装过程中遇到的问题及解决方法提供给大家，以方便新手。高手就不要看了
说明一下：Q代表安装过程中遇到的问题，或者是...
Likelihood of collision using most significant bits of a UUID in Java
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According to the documentation, the static method UUID.randomUUID() generates a type 4 UUID.
This means that six bits are used for some type information and the remaining 122 bits are assigned randomly.
The six non-random bits...
What is unit testing? [closed]
...ing the tests becomes automate-able and repeatable
You can test at a much more granular level than point-and-click testing via a GUI
Note that if your test code writes to a file, opens a database connection or does something over the network, it's more appropriately categorized as an integration t...
Why am I not getting a java.util.ConcurrentModificationException in this example?
Note: I am aware of the Iterator#remove() method.
10 Answers
10
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How do I change the language of moment.js?
... deprecated since moment 2.8.0, use locale() instead):
moment.lang("de").format('LLL');
http://momentjs.com/docs/#/i18n/
As of v2.8.1, moment.locale('de') sets the localization, but does not return a moment. Some examples:
var march = moment('2017-03')
console.log(march.format('MMMM')) // '...
Explain Python entry points?
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An "entry point" is typically a function (or other callable function-like object) that a developer or user of your Python package might want to use, though a non-callable object can be supplied as an entry point as well (as correctly pointed out in the comments!).
T...
Once upon a time, when > was faster than < … Wait, what?
I am reading an awesome OpenGL tutorial . It's really great, trust me. The topic I am currently at is Z-buffer. Aside from explaining what's it all about, the author mentions that we can perform custom depth tests, such as GL_LESS, GL_ALWAYS, etc. He also explains that the actual meaning of depth v...
Client-server synchronization pattern / algorithm?
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You should look at how distributed change management works. Look at SVN, CVS and other repositories that manage deltas work.
You have several use cases.
Synchronize changes. Your change-log (or delta history) approach looks good for this. Clients send their deltas to the s...
Difference between single quotes and double quotes in Javascript [duplicate]
...gle quotes where you want double quotes to appear inside the string (e.g. for html attributes) without having to escape them, or vice versa. Other than that, there is no difference.
However, note that JSON (JavaScript Object Notation) only supports double quoted strings.
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