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Using custom std::set comparator
...lled like a function).
struct lex_compare {
bool operator() (const int64_t& lhs, const int64_t& rhs) const {
stringstream s1, s2;
s1 << lhs;
s2 << rhs;
return s1.str() < s2.str();
}
};
You then use the class name as the type parameter...
How to install therubyracer gem on 10.10 Yosemite?
...ll
bundle exec rake clean build binary
gem install pkg/libv8-3.16.14.3-x86_64-darwin-12.gem #note that libv8 version may change, so tab through files in pkg/, also remember to use the one with version specified
then just bundle your project gems
this is the only way it worked for me on 10.10 (rub...
Print a string as hex bytes?
... !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13 Answers
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Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...客
可以选择对应平台的版本进行下载，此文档以x86_64平台的v26.1.4版本为准，获取版本离线包如下所示：
百度网盘获取docker、docker-compose版本详细信息如下所示：
2、安装docker
# 将下载后的docker安装包传至需要...
Volatile vs. Interlocked vs. lock
... don't know and don't care and that's the point of cache coherency of x86/x64). All the posts earlier by others who mentioned instruction reordering simply show they don't understand x86/x64 architectures. Volatile does not issue read/write barriers as implied by the earlier posts saying 'it prevent...
Why doesn't .NET/C# optimize for tail-call recursion?
...ate given recent JIT changes). Note that the CLR changes for 4.0 the x86, x64 and ia64 will respect it.
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HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this direct
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NASSER
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answered Aug 16 '14 at 15:09
user3943211user3943...
what's the correct way to send a file from REST web service to client?
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I don't recommend encoding binary data in base64 and wrapping it in JSON. It will just needlessly increase the size of the response and slow things down.
Simply serve your file data using GET and application/octect-streamusing one of the factory methods of javax.ws.rs.c...
Timer function to provide time in nano seconds using C++
...// x
All this clock does is count CPU cycles and store it in an unsigned 64-bit integer. You may need to tweak the assembly language syntax for your compiler. Or your compiler may offer an intrinsic you can use instead (e.g. now() {return __rdtsc();}).
To build a clock you have to give it the r...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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设置硬资源限制，一旦设置不能增加。
ulimit – Hs 64；限制硬资源，线程栈大小为 64K。
-S
设置软资源限制，设置后可以增加，但是不能超过硬资源设置。
ulimit – Sn 32；限制软资源，32 个文件描述符。
-a...