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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
...样的：
1）首先，先采样RTT，记下最近好几次的RTT值。
2）然后做平滑计算SRTT（ Smoothed RTT）。公式为：（其中的 α 取值在0.8 到 0.9之间，这个算法英文叫Exponential weighted moving average，中文叫：加权移动平均）
SRTT = ( α * ...
Square retrofit server mock for testing
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Mock Retrofit 2.0 Requests for Testing
As the old mechanisms like creating MockClient class and implementing it from Client are not working anymore with Retrofit 2.0, here I describe a new way of doing that. All what you need to do now is...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
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在 App Inventor 2 中使用图像
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在 App Inventor 2 中使用图像，避免一些常见的陷阱！
Out of memory errors
An example of misusing large images
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How to show current year in view?
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249
<%= Time.current.year %>
http://pleac.sourceforge.net/pleac_ruby/datesandtimes.html
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Regular expression for exact match of a string
...tch two passwords with regular expression. For example I have two inputs "123456" and "1234567" then the result should be not match (false). And when I have entered "123456" and "123456" then the result should be match (true).
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Why is XOR the default way to combine hashes?
...bit) inputs, the AND function output probability distribution is 75% 0 and 25% 1. Conversely, OR is 25% 0 and 75% 1.
The XOR function is 50% 0 and 50% 1, therefore it is good for combining uniform probability distributions.
This can be seen by writing out truth tables:
a | b | a AND b
---+---+--...
Ruby on Rails: How can I revert a migration with rake db:migrate?
...nt to revert.
eg. if you want to revert a migration with file name 3846656238_create_users.rb
rake db:migrate:down VERSION=3846656238
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C: What is the difference between ++i and i++?
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