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译文：理解Java中的弱引用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...要使用一个叫做Widget的类，但是这个类不能被继承，所以无法增加新的功能。
但是我们如果想追踪Widget对象的额外信息，我们该怎么办？ 假设我们需要记录每个对象的序列号，但是由于Widget类并不包含这个属性，而且也不能扩...
Zip lists in Python
...
When you zip() together three lists containing 20 elements each, the result has twenty elements. Each element is a three-tuple.
See for yourself:
In [1]: a = b = c = range(20)
In [2]: zip(a, b, c)
Out[2]:
[(0, 0, 0),
(1, 1, 1),
...
(17, 17, 17),
(18, 18, 18...
为何谷歌不可复制？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...从某种意义上说，由两位(前)谷歌人撰写的谷歌运营指南无法摆脱公关目的，但本着批判性阅读的精神去读，本书还是提供了一个观察现代性公司的新角度，尤其在后德鲁克管理学时代，一家成功公司背后的构成要素又是什么。
...
Statistics: combinations in Python
...ersions of scipy). When exact is False, it uses the gammaln function to obtain good precision without taking much time. In the exact case it returns an arbitrary-precision integer, which might take a long time to compute.
sh...
How to get back to most recent version in Git?
... @Nathan: In git a branch is really mostly a movable pointer to a certain revision. So conceptually, you're sort of creating a branch, but not in the sense that git thinks of branches.
– DLH
Aug 24 '10 at 17:26
...
OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的方法照做，进去后把参数修改回来，重启正常了，SSH 无法登陆的问题还是没有解决
又有说是算法的问题
http://bbs.51cto.com/thread-1176918-1.html
照做还是不行， 于是陷入了无休止的找资料之中
回过头来在来看
http://pk...
C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
...异常而导致的“全局展开”，对于程序员而言，这也许是无法避免的，因为你在利用异常处理机制提高程序可靠健壮性的同时，不可避免的会引起性能上其它的一些开销。呵呵！这世界其实也算瞒公平的，有得必有失。
到此，...
What does collation mean?
... @Piskvor: aren't coordinates in your info pointing to a certain country using an alphabet with 42 letters, 15 of them having diacritics?
– Quassnoi
Dec 27 '10 at 13:07
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When should I use genetic algorithms as opposed to neural networks? [closed]
...e useful for recognizing patterns. They follow a simplistic model of the brain, and by changing a number of weights between them, attempt to predict outputs based on inputs.
They are two fundamentally different entities, but sometimes the problems they are capable of solving overlap.
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SVG图像加载扩展 - 第三方扩展集合 · App Inventor 2 中文网
... 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...