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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...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++使用OLE/COM高速读写EXCEL的源码VC对Excel表格的操作的方法有多种，如：通过ODBC数据库实现，通过解析Excel表格文件，通过OLE COM的实现。本文主要研究通过OLE COM实现对Excel表格的操作。另外，本文主代码中汇聚各网友的智慧进行...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...
注意linux生产环境不能安装32位的mongodb，因为32位受限于操作系统最大2G的文件限制。
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器上启动mongodb
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongod...
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 ...
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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Javascript seconds to minutes and seconds
... var secs = ~~duration % 60;
// Output like "1:01" or "4:03:59" or "123:03:59"
var ret = "";
if (hrs > 0) {
ret += "" + hrs + ":" + (mins < 10 ? "0" : "");
}
ret += "" + mins + ":" + (secs < 10 ? "0" : "");
ret += "" + secs;
return ret;
}
~~ is a sh...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
Linux反编译全攻略一个简单的linuxcrackme的逆向前言最不喜欢的就是写破解教程，酒后一时冲动，老夫卿发少年狂，许下将写一篇linux平台逆向的文章的诺言，作...一个简单的linux crackme的逆向
前言
最不喜欢的就是写破解教...