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Why does an NSInteger variable have to be cast to long when used as a format argument?

... You get this warning if you compile on OS X (64-bit), because on that platform NSInteger is defined as long and is a 64-bit integer. The %i format, on the other hand, is for int, which is 32-bit. So the format and the actual parameter do not match in size. Since NSInte...
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dd: How to calculate optimal blocksize? [closed]

...enough block size lets dd do a good job, and the differences between, say, 64 KiB and 1 MiB are minor, compared to 4 KiB versus 64 KiB. (Though, admittedly, it's been a while since I did that. I use a mebibyte by default now, or just let dd pick the size.) ...
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Convert pem key to ssh-rsa format

...on CentOS release 6.5 (Final) Linux test1.example.local 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux OpenSSL 1.0.1e-fips 11 Feb 2013 References: Sysmic.org Convert keys betweens GnuPG, OpenSsh and OpenSSL ...
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Memcached下一站:HandlerSocket! - 更多技术 - 清泛网 - 专注C/C++及内核技术

...非主题内容,资料自查。 面对这些问题,HandlerSocket项目个不错的解决方案,它通过插件的方式赋予MySQL完整的NoSQL功能,从原理上讲,它跳过MySQL中最耗时的语法解析,查询计划等步骤,直接读取数据,如果内存够大,能装下...
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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...
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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...
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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...
https://www.tsingfun.com/it/bi... 

如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...
https://www.tsingfun.com/it/bi... 

如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...
https://www.tsingfun.com/it/bi... 

如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...习算法? 当然,如果你真心在乎准确率,最好的途径就测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen How do you know what machine learning algorithm to...