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Difference between & and && in Java? [duplicate]
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389
& is bitwise.
&& is logical.
& evaluates both sides of the operation.
&&a...
TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...这只是一个采样，不能代表普遍情况。
经典算法
RFC793 中定义的经典算法是这样的：
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...
String formatting named parameters?
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In Python 2.6+ and Python 3, you might choose to use the newer string formatting method.
print('<a href="{0}">{0}</a>'.format(my_url))
which saves you from repeating the argument, or
print('<a href="{url}">{url}</a>'.format...
How to initialize all members of an array to the same value in Swift?
...ue like this:
With old Swift version:
var threeDoubles = [Double](count: 3, repeatedValue: 0.0)
Since Swift 3.0:
var threeDoubles = [Double](repeating: 0.0, count: 3)
which would give:
[0.0, 0.0, 0.0]
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MAMP Pro 3.05 on Mavericks updated to Yosemite - Apache does not start
I have been running MAMP Pro 3.05 successfully in Yosemite up to DP4 on a partition that was a clean install of Yosemite.
1...
Integer division with remainder in JavaScript?
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1309
For some number y and some divisor x compute the quotient (quotient) and remainder (remainder)...
Rails - controller action name to string
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339
Rails 2.X: @controller.action_name
Rails 3.1.X: controller.action_name, action_name
Rails 4....
If list index exists, do X
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edited Dec 12 '16 at 0:03
Dimitris Fasarakis Hilliard
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Impossible to Install PG gem on my mac with Mavericks
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253
If you want to avoid using MacPorts, you can download the Postgres App and place it into the App...
How to implement a queue with three stacks?
...SUMMARY
O(1) algorithm is known for 6 stacks
O(1) algorithm is known for 3 stacks, but using lazy evaluation which in practice corresponds to having extra internal data structures, so it does not constitute a solution
People near Sedgewick have confirmed they are not aware of a 3-stack solution wi...