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How do you validate a URL with a regular expression in Python?

.... I was going to quote the regex for validating a valid email address, but 4K+ characters don't fit in this box. These things are just hard to do, and the best answer probably is a dedicated parser once you manage to find some candidate text to feed it. – RBerteig ...
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tinyxml XML解析库下载(tinyxml2.h 和 tinyxml2.cpp) - 源码下载 - 清泛...

... return _nUntracked; } // This number is perf sensitive. 4k seems like a good tradeoff on my machine. // The test file is large, 170k. // Release: VS2010 gcc(no opt) // 1k: 4000 // 2k: 4000 // 4k: 3900 21000 // 16k: 5200 // 32k: 4300 // 64k: 4000 21000 ...
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O(nlogn) Algorithm - Find three evenly spaced ones within binary string

...airs would be of the order of the square of the number of 1s in it: that's 4k ≈ n1.26 which unfortunately is asymptotically much larger than (n log n). In fact, the worst case is even worse: Leo Moser in 1953 constructed (effectively) such strings which have n1-c/√(log n) 1s in them but no evenl...
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How to write WinForms code that auto-scales to system font and dpi settings?

...150% on a 1080p screen or 300% which is the Windows recommended value on a 4K screen). But you need to subtract out for the giant Win10 title/caption bar... so more like 1000x680 max Size... which in the designer will be like 994x642 ClientSize. (So, you can do a FindAll References on ClientSize t...
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What is the advantage to using bloom filters?

...nt increases the size of the hash table significantly (The table size is 4*4k). This is assuming you encode the the elements using 2 bits / letter. share | improve this answer | ...
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What encoding/code page is cmd.exe using?

..., and stackoverflow.com/a/12015918, and msdn.microsoft.com/en-us/library/tw4k6df8(v=vs.90).aspx Besides obvious portability differences between _setmode() and SetConsoleOutputCP(), there may also be other subtleties and side-effects hidden in both approaches that's not fully understood at first glan...
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How does a hash table work?

...e order of memory page sizes (vs. say int keys at 1-in-1000 sparseness and 4k pages = most pages touched), and when the OS treats all-0 pages efficiently (so all-unused-bucket pages don't need backing memory), when address space is plentiful.... – Tony Delroy M...
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Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...: http://www.crackmes.de/users/veneta/crackmes/linux_crackme_v2 。古人“工欲善其事,必先利其器”,本文中所用到的工具及操作平台罗列如下: 操作平台: gentoo 2004.3 # kernel 2.6.9 逆向工具: 反汇编 -- objdump (这个工具基本上每个LINU...
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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...了利用cookie保存少量用户部分信息外(cookie一般不能超过4K的大小),对于App接入层,保存有用户相关的session数据,但是有些反向代理或者负载均衡不支持对session sticky支持不是很好或者对接入的可用性要求比较高(app接入节点宕机...
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动态追踪(Dynamic Tracing)技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...得非常缓慢,但我们并不知道为什么。现在大家都在拥抱计算和大数据,这种大规模的生产环境中的诡异问题只会越来越多,很容易占据工程师大部分的时间和精力。大部分问题其实是线上才有的问题,很难复现,或者几乎无...