varemenos

// Given a query string "?to=email&why=because&first=John&Last=smith"
// getUrlVar("to")  will return "email"
// getUrlVar("last") will return "smith"

// Slightly more concise and improved version based on http://www.jquery4u.com/snippets/url-parameters-jquery/
function getUrlVar(key){
	var result = new RegExp(key + "=([^&]*)", "i").exec(window.location.search); 
	return result && unescape(result[1]) || ""; 
}

johnrees

@mixin opacity($alpha) {
  // IE 8
  -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=$alpha*100)";
  // IE 5-7
  filter: alpha(opacity=$alpha*100);
  // Real Browsers
  -webkit-opacity: $alpha;
  -moz-opacity: $alpha;
  -khtml-opacity: $alpha;
  opacity: $alpha;

tkihira

var mkdir = function(dir) {
	// making directory without exception if exists
	try {
		fs.mkdirSync(dir, 0755);
	} catch(e) {
		if(e.code != "EEXIST") {
			throw e;
		}
	}
};

davoclavo

/*
The MIT License (MIT)
Copyright (c) 2016 David Gomez-Urquiza

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 

magnetikonline

IE 7/8/9/10/11 Virtual machines from Microsoft

We have moved: https://github.com/magnetikonline/linuxmicrosoftievirtualmachines

Due to the popularity of this Gist, and the work in keeping it updated via a Gist, all future updates will take place at the above location. Thanks!

plentz

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

dkubb

ssl_certificate         cert.pem;
ssl_certificate_key     cert.key.pem;
ssl_trusted_certificate cert.ca.pem;
ssl_dhparam             cert.dh.pem;

ssl_protocols             TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers               FIPS@STRENGTH:!aNULL:!eNULL;
ssl_prefer_server_ciphers on;

ssl_session_cache   shared:SSL:10m;

JacksonTian

Node.js异步处理CPU密集型任务

Node.js擅长数据密集型实时（data-intensive real-time）交互的应用场景。然而数据密集型实时应用程序并不是只有I/O密集型任务，当碰到CPU密集型任务时，比如要对数据加解密（node.bcrypt.js），数据压缩和解压（node-tar），或者要根据用户的身份对图片做些个性化处理，在这些场景下，主线程致力于做复杂的CPU计算，I/O请求队列中的任务就被阻塞。

Node.js主线程的event loop在处理所有的任务/事件时，都是沿着事件队列顺序执行的，所以在其中任何一个任务/事件本身没有完成之前，其它的回调、监听器、超时、nextTick()的函数都得不到运行的机会，因为被阻塞的event loop根本没机会处理它们，此时程序最好的情况是变慢，最糟的情况是停滞不动，像死掉一样。

一个可行的解决方案是新开进程，通过IPC通信，将CPU密集型任务交给子进程，子进程计算完毕后，再通过ipc消息通知主进程，并将结果返回给主进程。

和创建线程相比，开辟新进程的系统资源占用率大，进程间通信效率也不高。如果能不开新进程而是新开线程，将CPU耗时任务交给一个工作线程去做，然后主线程立即返回，处理其他的I/O请求，等到工作线程计算完毕后，通知主线程并将结果返回给主线程。那么在同时面对I/O密集型和CPU密集型服务的场景下，Node的主线程也会变得轻松，并能时刻保持高响应度。

ccbikai

# -*- coding: utf-8 -*-
import sys
reload(sys)
sys.setdefaultencoding('utf-8')

# unsplash 全站下载脚本
# 请先安装 requests ，BeautifulSoup
# pip install requests beautifulsoup4
# 运行 python unsplash.py
# 输入最小页数和最大页数

tomysmile

Install HomeBrew first

brew update
brew tap caskroom/cask
brew install brew-cask

If you get the error "already installed", follow the instructions to unlink it, then install again: