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//PhantomJS http://phantomjs.org/ based web crawler Anton Ivanov anton.al.ivanov@gmail.com 2012
//UPDATE: This gist has been made into a Node.js module and now can be installed with "npm install js-crawler"
//the Node.js version does not use Phantom.JS, but the API available to the client is similar to the present gist

(function(host) {

    function Crawler() {
        this.visitedURLs = {};
    };
    

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/**
 * loadJSONP( url, hollaback [, context] ) -> Null
 * - url (String): URL to data resource.
 * - hollaback (Function): Function to call when data is successfully loaded,
 *   it receives one argument: the data.
 * - context (Object): Context to invoke the hollaback function in.
 * 
 * Load external data through a JSONP interface.
 * 
 * ### Examples

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Install wkhtmltopdf on Ubuntu

This was tested on:

• Ubuntu 14.04 x64
• Ubuntu 16.04 x64

Installation

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How to Install Wkhtmltopdf and Wkhtmltoimage in Ubuntu

wget http://download.gna.org/wkhtmltopdf/0.12/0.12.3/wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
tar -xvf wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
cd wkhtmltox/bin/
sudo mv wkhtmltopdf  /usr/bin/wkhtmltopdf
sudo mv wkhtmltoimage  /usr/bin/wkhtmltoimage

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You can check here for getting the latest version. Change the wget url to download newer versions.

$ wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
$ tar -xvf wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
$ cd wkhtmltox/bin/
$ sudo mv wkhtmltopdf /usr/bin/wkhtmltopdf
$ sudo mv wkhtmltoimage /usr/bin/wkhtmltoimage
$ sudo chmod a+x /usr/bin/wkhtmltopdf

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// modules
var redis = require('redis');
var Step = require('step');

// config file
var config = require('config');

// mysql client connect
var mysql      = require('mysql');
var connection = mysql.createConnection({

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#! /usr/bin/env python

import redis
import random
import pylibmc
import sys

r = redis.Redis(host = 'localhost', port = 6389)
mc = pylibmc.Client(['localhost:11222'])

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from selenium import webdriver
from selenium.webdriver.remote.webelement import WebElement
import os.path

# JavaScript: HTML5 File drop
# source            : https://gist.github.com/florentbr/0eff8b785e85e93ecc3ce500169bd676
# param1 WebElement : Drop area element
# param2 Double     : Optional - Drop offset x relative to the top/left corner of the drop area. Center if 0.
# param3 Double     : Optional - Drop offset y relative to the top/left corner of the drop area. Center if 0.
# return WebElement : File input

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from selenium import webdriver
from selenium.webdriver.remote.webelement import WebElement
import os.path

# JavaScript: HTML5 File drop
# source            : https://gist.github.com/florentbr/0eff8b785e85e93ecc3ce500169bd676
# param1 WebElement : Drop area element
# param2 Double     : Optional - Drop offset x relative to the top/left corner of the drop area. Center if 0.
# param3 Double     : Optional - Drop offset y relative to the top/left corner of the drop area. Center if 0.
# return WebElement : File input

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Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}'

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32: