kenzo0107

# rootユーザへ切り替え
sudo su -
# wgetインストール
yum -y install wget
# repository取得
wget -r --no-parent -A 'epel-release-*.rpm' http://dl.fedoraproject.org/pub/epel/7/x86_64/e/
# repository設定
rpm -Uvh dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-*.rpm

# redisインストール

psayre23

Below are the Big O performance of common functions of different Java Collections.


List                 | Add  | Remove | Get  | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList            | O(1) |  O(n)  | O(1) |   O(n)   | O(1) | Array
LinkedList           | O(1) |  O(1)  | O(n) |   O(n)   | O(1) | Linked List
CopyOnWriteArrayList | O(n) |  O(n)  | O(1) |   O(n)   | O(1) | Array

Micka33

Installing Cassandra on Mac OS X

Install Homebrew

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

curtismcmullan

#!/bin/bash

# Following the guide found at this page
# http://programmingarehard.com/2014/03/17/behat-and-selenium-in-vagrant.html

echo "\r\nUpdating system ...\r\n"
sudo apt-get update


# Create folder to place selenium in

hkhamm

Testing Spark and Cassandra

This guide leads the user through a basic test of a local Spark and Cassandra software stack.

####Table of Contents

• Assumptions
• spark-shell
• spark-submit
• Troubleshooting

hkhamm

Install, Setup, and Test Spark and Cassandra on Mac OS X

This Gist assumes you already followed the instructions to install Cassandra, created a keyspace and table, and added some data.

Install Apache Spark

brew install apache-spark

LeCoupa

// XPath CheatSheet
// To test XPath in your Chrome Debugger: $x('/html/body')
// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/


// 0. XPath Examples.
// More: http://xpath.alephzarro.com/content/cheatsheet.html


'//hr[@class="edge" and position()=1]'                // every first hr of 'edge' class

seagatesoft

from random import choice
from scrapy import signals
from scrapy.exceptions import NotConfigured


class RotateUserAgentMiddleware(object):
    """Rotate user-agent for each request."""
    def __init__(self, user_agents):
        self.enabled = False
        self.user_agents = user_agents

JeremieGomez

#!/usr/bin/env python
#! -*- coding: utf-8 -*-

def build_graph(filename):
	graph = dict()
	with open(filename, 'r') as f:
		for line in f:
			s,t = line.split()
			s,t = int(s), int(t)
			dest_nodes = graph.get(s, set())

alonisser

#!/bin/bash
#
# Bash script to setup headless Selenium (uses Xvfb and Chrome)
# (Tested on Ubuntu 12.04) trying on ubuntu server 14.04

# Add Google Chrome's repo to sources.list
echo "deb http://dl.google.com/linux/chrome/deb/ stable main" | sudo tee -a /etc/apt/sources.list

# Install Google's public key used for signing packages (e.g. Chrome)
# (Source: http://www.google.com/linuxrepositories/)