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Why is it slower to iterate over a small string than a small list?
...rule out Tim Peter's 10-times-upvoted answer!
>>> foo = iterable[123]
>>> iterable[36] is foo
True
These are not new objects!
But this is worth mentioning: indexing costs. The difference will likely be in the indexing, so remove the iteration and just index:
>>> pytho...
MySQL join with where clause
... in A table which having id null in B table
– Veeresh123
Aug 29 '16 at 6:57
@Veeresh123, what are A and B table ? Can ...
C/C++中退出线程的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...有C++对象均将通过它们的撤消函数正确地撤消。
（2）操作系统将正确地释放线程堆栈使用的内存。
（3）系统将线程的退出代码（在线程的内核对象中维护）设置为线程函数的返回值。
（4）系统将递减线程内核对象的使用...
Using generic std::function objects with member functions in one class
...;
// Call with late supplied 'this'
MyClass myInst;
callable(&myInst, 123);
What would the storage type look like without auto?
Something like this:
std::_Mem_fn_wrap<void,void (__cdecl TestA::*)(int),TestA,int> callable
You can also pass this function storage to a standard function ...
how to change default python version?
...in 8 Apr 28 15:51 pydoc3@ -> pydoc3.2
-rwxrwxr-x 1 root admin 123 Feb 20 11:14 pydoc3.2*
-rwxrwxr-x 2 root admin 25624 Feb 20 11:14 python3*
lrwxr-xr-x 1 root admin 12 Apr 28 15:51 python3-32@ -> python3.2-32
lrwxr-xr-x 1 root admin 16 Apr 28 15:51 python3-config@ ->...
Show hidden div on ng-click within ng-repeat
...hide the first div when I click on second div.
– User123
Oct 12 '16 at 7:41
To answer the Q above... Just change the n...
Typedef function pointer?
... {
return u*v;
}
t_somefunc afunc = &product;
...
int x2 = (*afunc)(123, 456); // call product() to calculate 123*456
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分段机制、分页机制到底是什么？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...关心线性地址（看起来连续的整块地址空间），
寻址时操作系统层面需要通过页面page映射成逻辑地址，逻辑地址也不是真正的内存地址，
需要配合段选择子计算出最终的物理地址，然后便可完成物理内存读取。分段机制 分页...
【解决】bufferevent_openssl.c:228:19: error: storage size of \'methods...
【解决】bufferevent_openssl.c:228:19: error: storage size of 'methods_bufferevent' isn't knownxunsearch 升级 安装的时候报 libevent 编译错误：bufferevent_openssl c:228:19: error: storage size of & 39;methods_bufferevent& 39; isn& 39;t knownstatic BIO_ xunsearch 升级/安装的时...
第一个Hello,OS World操作系统源码下载 - c++1y / stl - 清泛IT社区，为创新赋能！
原文参见：《第一个Hello,OS World操作系统》。
原文中代码均已贴上，为了鼓励大家自己动手敲写代码、自行调试运行，加深对代码的理解，此部分工程源码不免费提供下载，需要10F币，希望大家多多理解支持。