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Any open source alternatives to balsamiq mockup [closed]
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edited May 25 '13 at 1:29
Gringo Suave
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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
...端发包时记下t0，然后接收端再把这个ack回来时再记一个t1，于是RTT = t1 – t0。没那么简单，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...
Extracting just Month and Year separately from Pandas Datetime column
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11 Answers
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Selecting the last value of a column
...xRows();
var values = SpreadsheetApp.getActiveSheet().getRange(column + "1:" + column + lastRow).getValues();
for (; values[lastRow - 1] == "" && lastRow > 0; lastRow--) {}
return values[lastRow - 1];
}
Usage:
=lastValue("G")
EDIT:
In response to the comment asking for the fu...
Why is it OK to return a 'vector' from a function?
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answered Mar 26 '14 at 8:22
πάντα ῥεῖπάντα ῥεῖ
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What's the idiomatic syntax for prepending to a short python list?
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819
The s.insert(0, x) form is the most common.
Whenever you see it though, it may be time to cons...
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
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319
@NotNull: The CharSequence, Collection, Map or Array object is not null, but can be empty.
@Not...
Twig: in_array or similar possible within if statement?
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edited Apr 30 '15 at 4:42
jake stayman
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answered Sep...
How do you query for “is not null” in Mongo?
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10 Answers
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How to produce a range with step n in bash? (generate a sequence of numbers with increments)
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201
I'd do
for i in `seq 0 2 10`; do echo $i; done
(though of course seq 0 2 10 will produce the ...