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Add column with number of days between dates in DataFrame pandas
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to create a GUID/UUID in Python
...he UUID with the dashes included, while uuid4().hex returns "The UUID as a 32-character hexadecimal string"
– stuartd
Jan 30 '18 at 10:08
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Why does volatile exist?
...Flexo♦
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answered Sep 16 '08 at 14:04
Doug T.Doug T.
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C++并发编程（中文版） - 文档下载 - 清泛网 - 专注C/C++及内核技术
...文版）作为对《C++ Concurrency in Action》的中文翻译。本书是基于C++11新标准的并发和多线程编程深度指南。从std::thr 作为对《C++ Concurrency in Action》的中文翻译。
本书是基于C++11新标准的并发和多线程编程深度指南。
从std::thread...
半年报披露 天涯社区被资本方看空 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的路要走。
天涯社区作为BBS社区的代表性网站，一度曾是社会舆论的重要发源地。但是，随着微博、微信等即时性社交平台的出现，天涯社区与其他BBS社区一起逐渐退出了舞台的中央。其前几年在海外上市、A股上市均告失败，...
故乡的冬日 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...的刹那，真的会忘掉人世间的一切烦恼和忧伤，顿觉生命是那样的单纯，单纯得像雪。
散步的人悠闲地踱着，满脸慈祥的爷爷站在路旁看着街景：有条不紊正在收摊的小贩，来来往往慢悠悠行驶的大车、小车，而年幼调皮的小...
Is it possible to make anonymous inner classes in Java static?
...you want to baffle those maintaining your code, wags have discovered javac.exe will permit anonymous classes inside static init code and static methods, even though the language spec says than anonymous classes are never static. These anonymous classes, of course, have no access to the instance fiel...
Create thumbnail image
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answered May 11 '10 at 7:53
Russell TroywestRussell Troywest
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How to encrypt/decrypt data in php?
...hich has a fixed block size of 16 bytes and a key size of either 16, 24 or 32 bytes.
Encryption key
A good encryption key is a binary blob that's generated from a reliable random number generator. The following example would be recommended (>= 5.3):
$key_size = 32; // 256 bits
$encryption_key ...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...望去学习新知识的那种动力，可能在大多数的人眼里，php是专为web而生，做wep app是一流的快速好用，并极易简单和容易上手，做起web所需的各项功能可能是分分钟搞定，然后做socket了？可能就觉得不屑一顾了，好像是不务正业...