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subtle differences between JavaScript and Lua [closed]
...xample, if foo ~= 20 then ... end.
Lua 5.3 and up use ~ for binary bitwise XOR, whereas JS uses ^.
In Lua, any type of value (except nil and NaN) can be used to index a table. In JavaScript, all non-string types (except Symbol) are converted to strings before being used to index an object. For exam...
Mysql substr和Oracle substr区别 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
Mysql substr和Oracle substr区别Oracle substr(字符串，开始索引、从0起，长度)Mysql substr或substring(字符串，开始索引、从1起，长度)Oracle substr(字符串，开始索引、从0起，长度)
Mysql substr或substring(字符串，开始索引、从1起，长度)Mysql Orac...
What is the preferred Bash shebang?
...through 2018 /usr/bin/env exists on more machines than either of /bin/bash xor /usr/bin/bash, so a script that starts with this line will do the expected thing on as many machines as possible.
– l0b0
Mar 8 '18 at 20:28
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HAproxy - Web负载均衡解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...您当前的架构中， 同时可以保护你的web服务器不被暴露到网络上。
下图是HAProxy的架构：
下图是HAProxy的监控页面截图：
HAProxy实现了一种事件驱动, 单一进程模型，此模型支持非常大的并发连接数。多进程或多线程模型受...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
... answered Jan 16 '14 at 22:07
XORXOR
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未能从“const std::string”为“const std::_Tree<_Traits> &”...
http://blog.csdn.net/mfcing/article/details/44157227
安卓App可以实现从其他App的目录中拷贝文件吗？ - App应用开发 - 清泛IT社...
先说结论：不可以，因为安卓的核心安全机制（沙箱机制）禁止访问其他app的私有目录。
例外：
1、取得了root权限。
2、公共目录可以，比如相册目录、/sdcard 目录等。
3、如果其他应用通过 ContentProvider 或 FileProvider 显式共...
What is the difference between memmove and memcpy?
... that way. Thats indeed relevant as most memmove implementations just do a XOR-swap.
– dhein
May 8 '15 at 11:25
3
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How to remove an item for a OR'd enum?
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What about xor(^)?
Given that the FLAG you are trying to remove is there, it will work.. if not, you will have to use an &.
public enum Colour
{
None = 0, // default value
RED = 2,
BLUE = 4,
GREEN = 8,
YELLOW ...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...应用程序。 比如：假设有一个图像转换服务，调整图像到所需的尺寸和分辨率。所有提供转换的服务、所有使用该服务的应用程序以及所有的中间节点，比如负载均衡等，共同组成了拓扑。 通常，拓扑具有以下属性： ...