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c/c++浮点输出时，不显示小数点后没用的0 - C/C++ - 清泛网 - 专注C/C++及内核技术
...科学记数法还是一般的小数记数法。
例如：
float f = 3.14;
printf("%f\n", f);
printf("%g\n", f);
不过要注意，若使用%g输出0.000000001（即浮点数的0，不理解的请参考《浮点数在内存中的表示》）时，它显示的是e-xxx科学计数的形...
TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ek数据
带索引插入性能对比。
http://www.tokutek.com/2013/06/iibench-benchmark-tokumx-vs-mongodb/
以上为Tokutek的测试数据，下面为我测试的数据：
笔者实际测试
生产数据2亿多条导入测试
先建集合，创建3个索引，包括_id共4个索引...
RedHat 6 双网卡 TEAM - 更多技术 - 清泛网 - 专注C/C++及内核技术
...0
DEVICE=eth0
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
ONBOOT=yes
3. 修改网卡eth1的配置
vim /etc/syconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
ONBOOT=yes
4.创建modprobe.conf, Redhat6与5不同, 没有/etc/modprobe.conf这个文...
Cannot add or update a child row: a foreign key constraint fails
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236
You're getting this error because you're trying to add/update a row to table2 that does not hav...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
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FooInterface的析构函数~FooInterface()必须是virtual的
在第13行，我们得把getArbitraryString定义为纯虚函数。其实getArbitraryString()也不一定得是纯虚函数，这点我们后面会提到.
现在我们用Google Mock来定义Mock类 FooMock.h
#ifndef MOC...
How to find issues that at some point has been assigned to you?
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283
This is meanwhile possible by means of the JIRA Query Language (JQL) operator 'WAS', which has b...
How to retrieve the current version of a MySQL database management system (DBMS)?
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133
Many answers suggest to use mysql --version. But the mysql programm is the client. The server i...
Git copy file preserving history [duplicate]
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83
Unlike subversion, git does not have a per-file history. If you look at the commit data structur...
Swift compiler segmentation fault when building
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FjohnFjohn
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Changing route doesn't scroll to top in the new page
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answered Jul 3 '14 at 8:53
Konrad KissKonrad Kiss
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