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@ivanvanderbyl
ivanvanderbyl / gist:4222308
Created December 6, 2012 06:55
Postgres 9.1 to 9.2 upgrade guide for Ubuntu 12.04
sudo add-apt-repository ppa:pitti/postgresql
sudo apt-get update
sudo apt-get install postgresql-9.2 postgresql-server-dev-9.2 postgresql-contrib-9.2
sudo su -l postgres
psql -d template1 -p 5433
CREATE EXTENSION IF NOT EXISTS hstore;
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
service postgresql stop
/usr/lib/postgresql/9.2/bin/pg_upgrade -b /usr/lib/postgresql/9.1/bin -B /usr/lib/postgresql/9.2/bin -d /var/lib/postgresql/9.1/main/ -D /var/lib/postgresql/9.2/main/ -O "-c config_file=/etc/postgresql/9.2/main/postgresql.conf" -o "-c config_file=/etc/postgresql/9.1/main/postgresql.conf"
@pchalasani
pchalasani / HyperLogLog
Created December 19, 2012 16:17
Cascalog Example
;; Create a map without quoting: (an interesting defmacro exercise!)
;; (qmap city nyc population 14000000)
;; => {"city" "nyc", "population" "14000000"}
;; (some special chars still need to be quoted though!)
(defmacro qmap [& args]
`(apply hash-map (map name (map str '~args))))
;; conf settings:
@tehprofessor
tehprofessor / watir_phantomjs_user_agent_settings.rb
Created May 1, 2013 18:28
Configuring Watir to use a custom user agent with the PhantomJS driver. The user agent gem has been deprecated, and this functionality is not documented anywhere (obvious).
require 'watir-webdriver'
capabilities = Selenium::WebDriver::Remote::Capabilities.phantomjs("phantomjs.page.settings.userAgent" => "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1468.0 Safari/537.36")
driver = Selenium::WebDriver.for :phantomjs, :desired_capabilities => capabilities
browser = ::Watir::Browser.new driver
# Quick test to make sure it's set
browser.goto 'http://www.useragentstring.com/'
browser.textarea(:id => "uas_textfeld").value
@dmitshur
dmitshur / gist:6927554
Last active July 14, 2024 16:13
[Legacy GOPATH mode] How to `go get` private repos using SSH key auth instead of password auth.
@debasishg
debasishg / gist:8172796
Last active July 5, 2024 11:53
A collection of links for streaming algorithms and data structures

General Background and Overview

  1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
  2. Models and Issues in Data Stream Systems
  3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
  4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
  5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t
@sebsto
sebsto / gist:19b99f1fa1f32cae5d00
Created August 8, 2014 15:53
Install Maven with Yum on Amazon Linux
sudo wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo
sudo sed -i s/\$releasever/6/g /etc/yum.repos.d/epel-apache-maven.repo
sudo yum install -y apache-maven
mvn --version