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如何编写一个独立的 PHP 扩展（译） - 更多技术 - 清泛网 - 专注C/C++及内核技术
如何编写一个独立的 PHP 扩展（译）how-to-create-a-php-extension本文翻译自 PHP 源码中的 README.SELF-CONTAINED-EXTENSIONS。文中标记了注的内容均为自己添加。内容有点老，也挺啰嗦，没讲什么深入的...本文翻译自 PHP 源码中的 README.SELF-CONTAI...
How can I create a copy of an object in Python?
...p copying please refer to the other answers to this question and the nice explanation in this answer to a related question.
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How do I clear the terminal screen in Haskell?
...the shell command
:! cls under windows
:! clear under linux and OS X
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how to check the jdk version used to compile a .class file [duplicate]
... looking for this on the command line (for a class called MyClass):
On Unix/Linux:
javap -verbose MyClass | grep "major"
On Windows:
javap -verbose MyClass | findstr "major"
You want the major version from the results. Here are some example values:
Java 1.2 uses major version 46
Java 1.3 us...
Auto-expanding layout with Qt-Designer
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After creating your QVBoxLayout in Qt Designer, right-click on the background of your widget/dialog/window (not the QVBoxLayout, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout s...
TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：（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 * SRTT ) + ((1- α) * RTT)
3）开始计算RTO。公式如下：
RTO = min [ UBOUND, max [ LBOUND, (β * SRTT) ] ]
其...
How to get the response of XMLHttpRequest?
I'd like to know how to use XMLHttpRequest to load the content of a remote URL and have the HTML of the accessed site stored in a JS variable.
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What's “P=NP?”, and why is it such a famous question? [closed]
...ic polynomial time.
Definitions:
Polynomial time means that the complexity of the algorithm is O(n^k), where n is the size of your data (e. g. number of elements in a list to be sorted), and k is a constant.
Complexity is time measured in the number of operations it would take, as a function of...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object.
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Is it safe to use Project Lombok? [closed]
...any bright ideas how to implement it. I mean, just generating a standard text is not that useful. Like getFoo, returns foo, setFoo sets the foo? How is that going to help?
– Roel Spilker
Oct 4 '10 at 7:46
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