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How to model type-safe enum types?
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http://www.scala-lang.org/docu/files/api/scala/Enumeration.html
Example use
object Main extends App {
object WeekDay extends Enumeration {
type WeekDay = Value
val Mon, Tue, Wed, Thu, Fri, Sat, Sun = Valu...
Python, remove all non-alphabet chars from string
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How to vertically center a container in Bootstrap?
...;
<div class="container">
content
</div>
</div>
http://www.codeply.com/go/ui6ABmMTLv
Important: Vertical centering is relative to height. The parent container of the items you're attempting to center must have a defined height. If you want the height of the page use vh-100...
?: operator (the 'Elvis operator') in PHP
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CSS hexadecimal RGBA?
...re support this notation now, Edge still missing but will probably follow (https://caniuse.com/#feat=css-rrggbbaa).
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Check whether a variable is a string in Ruby
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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...图说明了这个过程。
这里，我需要提一下的是一篇Google的论文《An Argument for Increasing TCP’s Initial Congestion Window》Linux 3.0后采用了这篇论文的建议——把cwnd 初始化成了 10个MSS。 而Linux 3.0以前，比如2.6，Linux采用了RFC3390，c...
How expensive is the lock statement?
...rstand how much work can be pushed through in multiple scenarios:
https://www.codeproject.com/Articles/1236238/Unified-Concurrency-I-Introduction
https://www.codeproject.com/Articles/1237518/Unified-Concurrency-II-benchmarking-methodologies
https://www.codeproject.com/Articles/1242156/Unified-Concu...
ALTER TABLE without locking the table?
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See Facebook's online schema change tool.
http://www.facebook.com/notes/mysql-at-facebook/online-schema-change-for-mysql/430801045932
Not for the faint of heart; but it will do the job.
shar...
Using awk to remove the Byte-order mark
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