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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...文件，不适合我的需求，所以我没用，而是用PHP写了一个脚本，平稳运行了一段时间后，我发现数据导入的速度下降了，同时PHP抛出异常：
cursor timed out (timeout: 30000, time left: 0:0, status: 0)
我一时判断不出问题所在，想想先在PHP...
How can I format a number into a string with leading zeros?
...d Mar 24 '11 at 11:26
Øyvind BråthenØyvind Bråthen
52.2k2525 gold badges113113 silver badges138138 bronze badges
...
make_unique and perfect forwarding
...ered Mar 11 '12 at 19:06
Johan RådeJohan Råde
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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...group: [postdrop]
3、为postfix提供Syv服务/etc/rc.d/init.d/postfix脚本
脚本朋友们可以从附件中下载
4、对postfix进行基本配置，测试启动发信
编辑/etc/postfix/main.cf
myhostname = mail.huatuo.com #指定运行postfix邮件系统的主机的主机名
m...
How can I get this ASP.NET MVC SelectList to work?
I create a selectList in my controller, to display in the view.
23 Answers
23
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How to prevent http file caching in Apache httpd (MAMP)
... 30 '12 at 15:30
Charlie RudenstålCharlie Rudenstål
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...
Multiple commands in gdb separated by some sort of delimiter ';'?
...
You can do this using the python integration in gdb.
It would be nice if s ; bt stepped and then printed a backtrace, but it doesn't.
You can accomplish the same thing by calling into the Python interpreter.
python import gdb ; print(gdb.execute("s...
Convert a list to a string in C#
...d Feb 12 '11 at 23:46
Øyvind BråthenØyvind Bråthen
52.2k2525 gold badges113113 silver badges138138 bronze badges
...
What encoding/code page is cmd.exe using?
When I open cmd.exe in Windows, what encoding is it using?
6 Answers
6
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Generate list of all possible permutations of a string
...
Non recursive solution according to Knuth, Python example:
def nextPermutation(perm):
k0 = None
for i in range(len(perm)-1):
if perm[i]<perm[i+1]:
k0=i
if k0 == None:
return None
l0 = k0+1
for i in range(k0+1, len...