| # Install tmux on rhel/centos 7 | |
| # What do we want? | |
| libeventversion=2.1.11 | |
| tmuxversion=3.1 | |
| # install deps | |
| yum install gcc kernel-devel make ncurses-devel | |
| # DOWNLOAD SOURCES FOR LIBEVENT AND MAKE AND INSTALL |
| # Run this as CoreOS user at home folder | |
| set -e | |
| toolbox dnf -y install bash-completion wget \ | |
| && toolbox wget https://raw.githubusercontent.com/docker/docker/master/contrib/completion/bash/docker -O /usr/share/bash-completion/completions/docker \ | |
| && toolbox cp /usr/share/bash-completion /media/root/var/ -R \ | |
| && source /var/bash-completion/bash_completion | |
| cp $(readlink .bashrc) .bashrc.new && mv .bashrc.new .bashrc | |
| echo "source /var/bash-completion/bash_completion" >> ~/.bashrc |
| def execute(cmd, flag_file=None, msg_id='', debug=False): | |
| """ | |
| # http://stackoverflow.com/questions/1606795/catching-stdout-in-realtime-from-subprocess | |
| :param cmd: should never inlcude pipe or redirection, which would requires | |
| a new shell process | |
| This execute logs all stdout and stderr, which could look funny, especially | |
| when it comes to tools like aspc and wget | |
| """ | |
| logger.info('executing: {0}'.format(cmd)) | |
| # todo: should check whether cmdsp includes pipe or redirection here |
NOTE: This package is not supported by VMWare and may cause problems in some cases like updating ESXi. So it is recommended to uninstall the VIB prior to major system changes. NOTE: NUT has its own official IANA port: 3493/TCP.
| # file: config/initialize/httparty.rb | |
| require 'httparty' | |
| module HTTParty | |
| class Request | |
| alias_method :_original_perform, :perform | |
| def perform(&block) | |
| payload = { | |
| method: http_method.const_get(:METHOD), | |
| url: uri |
| #ruby '2.1.0' | |
| source 'https://rubygems.org' | |
| gem 'rack', '~>1.5.2' | |
| gem 'actionpack', '~> 4.1.0.beta1' | |
| gem 'railties', '~> 4.1.0.beta1' |
As of version 3.3, python includes the very promising concurrent.futures module, with elegant context managers for running tasks concurrently. Thanks to the simple and consistent interface you can use both threads and processes with minimal effort.
For most CPU bound tasks - anything that is heavy number crunching - you want your program to use all the CPUs in your PC. The simplest way to get a CPU bound task to run in parallel is to use the ProcessPoolExecutor, which will create enough sub-processes to keep all your CPUs busy.
We use the context manager thusly:
with concurrent.futures.ProcessPoolExecutor() as executor:
| Y组合子是Lambda演算的一部分，也是函数式编程的理论基础。 | |
| 它是一种方法/技巧，在没有赋值语句的前提下定义递归的匿名函数。 | |
| 即仅仅通过Lambda表达式这个最基本的“原子”实现循环/迭代。 | |
| 颇有道生一、一生二、二生三、三生万物的感觉。 | |
| 虽然Y组合子在理论上很优美，但在实际开发中并不会真的用到。 | |
| 想要了解Y组合子是什么，请参见维基百科：http://en.wikipedia.org/wiki/Fixed-point_combinator#Y_combinator | |
| 或者知乎上的回答：http://www.zhihu.com/question/20115649 |