take sth. with a grain of salt 这个习语的字面意思是“和一撮盐一起吃下去”,为什么要与盐一起吃呢? 据说这个习语要追溯到罗马时代,罗马将军庞培曾发现一种解毒剂,必须和着一小把盐才服得下去.解毒剂难咽,加了盐也许好咽些,于是这句习语用于描述对一些不靠谱的,值得怀疑的东西,得“和着盐”才能勉强接受. 现在,对某件事情或某人说的话有所保留,将信将疑,持怀疑态度,就可以说 take it with a grain of salt. 英文注释是:To take somethi

It shows how to use RBFSampler and Nystroem to approximate the feature map of an RBF kernel for classification with an SVM on the digits dataset. Results using a linear SVM in the original space, a linear SVM using the approximate mappings and using

最近在学习机器学习,学习和积累和一些关于机器学习的算法,今天介绍一种机器学习里面各种分类算法的比较 #!/usr/bin/python # -*- coding: utf-8 -*- """ ===================== Classifier comparison ===================== A comparison of a several classifiers in scikit-learn on synthetic datasets. T

以前做了一个应用,里面用到了FMDB,进行每一次操作前,都open,完成操作后都close.因为我是参考他们以前的代码.程序初期没发现什么问题,程序完成后,各种卡顿就出现了!即使我是放在新线程里操作的.仔细检查后发现,程序用在open 和 close上的cpu占有率异常地高,尤其是快速操作进行测试时.后来我查到了下面的帖子,原来,用错了! http://stackoverflow.com/questions/15720272/when-to-close-sqlite-database-using

At this point, we’ve sent draw calls down from our app all the way through various driver layers and the command processor; now, finally we’re actually going to do some graphics processing on it! In this part, I’ll look at the vertex pipeline. But be

a hot potato : speak of an issue(mostly current) which many people are talking about and which is usually siaputed. add insult to injury : to further a loss with mockery or indignity; to worsen an unfavorable situation. at the drop of a hat : without

命令 命令格式: salt '<操作目标>' <方法>[参数] 例: salt 'wx' cmd.run 'free -m' #查看被控主机内存使用情况 常用参数 针对<操作目标>,Saltstack提供了多种方法对被控主机(id)进行过滤.下面列举出常用具体参数:-E,--pcre,通过正则表达式进行匹配: salt -E '^SN2013.*' test.ping #探测SN2013开头的主机id名是否连通 -L,--list,以主机id名列表的形式进行过滤,格式与

转载声明: 翻译仅以技术学习和交流为目的,如需转载请务必标明原帖链接. 来源:http://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list 英文水平有限,加上在 stackoverflow 混的人,母语都带一定的地方色彩,向我们的 chinenglish.如果你觉得有误,欢迎留言指正. All levels 1.<C++程序设计语言>(Bjarne Stroustrup) [The C++ Prog

转载于stackoverflow:http://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list 感谢George Stocker的总结 Reference Style - All Levels A Tour of C++ (Bjarne Stroustrup) The "tour" is a quick (about 180 pages and 14 chapters) tutorial o

学习c++的书单 转自 http://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list Beginner Introductory If you are new to programming or if you have experience in other languages and are new to C++, these books are highly recommended. C++ Pr

转:http://blog.surecase.eu/using-greendao-with-android-studio-ide/ In this tutorial we will show you step by step how we have created sample application that presents our own Android Studio-GreenDao communication module. We tried to focus mainly on th

Note that memory usage on modern operating systems like Linux is an extremely complicated and difficult to understand area. In fact the chances of you actually correctly interpreting whatever numbers you get is extremely low. (Pretty much every time

Ultimate Facebook Messenger for Business Guide (Updated: Feb 2019) By Iaroslav Kudritskiy November 29, 2018  It's right to be hesitant when adding more channels for contacting your business. Adding Facebook Messenger means another place to manage use

MCE现象 Intel在Pentium 4.Xenon和P6系列处理器中实现了机器检查(Machinecheck)架构,提供能够检测和报告硬件(机器)的错误机制,如系统总线错误.ECC错误.奇偶校验错误.缓存错误.TLB错误等.它包括一直MSR(Model-Specific Registers)寄存器,用来设置机器检查和额外的bank MSR记录错误. 当机器检查到不可纠正的machine-check错误时,就触发一个machine-check异常.machine-check架构不允许在出现MC

JavaScript has a strange naming history. For its initial release in 1995 as part of Netscape Navigator, Netscape labeled their new language LiveScript, before renaming it to JavaScript a year later, hoping to capitalize on Java’s popularity at the ti

这两天的一个小任务是MongoDB服务器的调优,恰好这段时间对Linux的各种性能诊断.调优感兴趣,就顺着这个任务多翻了些书和文章. 新学到的一个东西是 Linux磁盘的I/O队列调度策略,至少MySQL和PostgreSQL都推荐调整这个: http://www.mysqlperformanceblog.com/2009/01/30/linux-schedulers-in-tpcc-like-benchmark/ http://www.cybertec.at/postgresql-linux-

scikit-learn: machine learning in Python — scikit-learn 0.20.0 documentation https://scikit-learn.org/stable/index.html Simple and efficient tools for data mining and data analysis Accessible to everybody, and reusable in various contexts Built on Nu

一.常用操作 ①.模块查看 #查看全部模块 [root@k8s_master ~]# salt '*' sys.list_modules # "*"为所有node节点 (此处可以写通过salt-key -L 命令获取的node节点的名称) k8s_master: - acl - aliases - alternatives - archive 查看模块对应的api salt k8s_master sys.list_state_functions [root@k8s_master ~]#

vultr官方网站:www.vultr.comdigitalocean官方网站:www.digitalocean.comlinode官方网站:www.linode.com 一般来说我们买VPS的时候都会从多方面来考虑,慨括来说就是好用还他妈的便宜,对吧?这里我来简单的说说 vultr.com.digitalocean和linode.com 这三家VPS,为什么要拿这三家举例说明呢?因为,据我目前使用过的VPS来说这三家算是最有特色的, 不管是售后服务.VPS性能还是他们的价格都是有着独到优势的.

http://gdgzzch.blog.163.com/blog/static/37640452201371483147573/ http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android#2299813http://my.oschina.net/shaorongjie/blog/128442 可以使用adb shell dumpsys meminfo -