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企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...地大，从而使得单次哈希计算的速度变长，增加恶意人员破解密码的难度。反过来，如果有一百个人或者一千个人同时执行登陆操作，那么这么繁琐的哈希计算将导致登陆服务器产生“忙不过来”的情况。此时我们就需要使用负...
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
...面的原因，并不会提供任何调试符号，以增加逆向工程和破解的难度。其中有一个例子是 Intel 公司的 IPP 这个程序库。IPP 针对 Intel 的芯片提供了很多常见算法的优化实现。我们也曾经尝试过在生产系统上面去使用基于 IPP 的 gzip...
How to delete history of last 10 commands in shell?
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Fizer Khan
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answered Feb 7 '13 at 12:07
WheretheresaWill...
Defining an array of anonymous objects in CoffeeScript
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island205island205
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6
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Validating IPv4 addresses with regexp
...idation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
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How to get row from R data.frame
...is, for example:
#Add your data
x <- structure(list(A = c(5, 3.5, 3.25, 4.25, 1.5 ),
B = c(4.25, 4, 4, 4.5, 4.5 ),
C = c(4.5, 2.5, 4, 2.25, 3 )
),
.Names = c("A", "B", "C"),
class = "da...
Catch an exception thrown by an async void method
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edited Mar 25 '19 at 15:18
adamj537
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answered Mar 21...
PostgreSQL database default location on Linux
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answered Nov 25 '17 at 23:02
Roby SottiniRoby Sottini
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Regular expression that matches valid IPv6 addresses
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254
I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote...
How do I calculate the date six months from the current date using the datetime Python module?
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edited Mar 25 '16 at 19:17
Paul
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a...