Leonid Kovnatskiy altV

Running Ubuntu on a Macbook Air

You don't have to be a slave to OS X! Here's a guide to a sane dual-booting setup with Ubuntu 12.10 on your shiny MacBook Air. This is written and tested for a MacBook Air 5,2 (Mid 2012), but likely works the same with any modern Macbook.

Install according to instructions at this URL:

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

For Shame!

Clojure error reporting is a problem. This gist contains examples of missed opportunities for a clear error message. Let's discuss how common scenarios can be improved, and get some "patch welcome" tickets out there with clearly defined expectations.

The problem

#Some discussions on logging from docker: Using logstash Using Papertrail

Issue Loging Drivers

Issue Enhanced Logging

A lot of this boils down to whether you want a single or multi-process (systemd, supervisord etc.) container...

	<!doctype html>

	<!-- http://taylor.fausak.me/2015/01/27/ios-8-web-apps/ -->

	<html>
	<head>
	<title>iOS 8 web app</title>

	<!-- CONFIGURATION -->

	;; Datomic example code
	(use '[datomic.api :only (db q) :as d])

	;; ?answer binds a scalar
	(q '[:find ?answer :in ?answer]
	42)

	;; of course you can bind more than one of anything
	(q '[:find ?last ?first :in ?last ?first]
	"Doe" "John")

	(ns cheshire.experimental
	(:require [cheshire.core :refer :all]
	[clojure.java.io :refer :all])
	(:import (java.io ByteArrayInputStream FilterInputStream
	SequenceInputStream)))

	(defn escaping-input-stream
	[is]
	(let [new-is (proxy [FilterInputStream] [is]
	(read

	-- a quick LUA access script for nginx to check IP addresses against an
	-- `ip_blacklist` set in Redis, and if a match is found send a HTTP 403.
	--
	-- allows for a common blacklist to be shared between a bunch of nginx
	-- web servers using a remote redis instance. lookups are cached for a
	-- configurable period of time.
	--
	-- block an ip:
	-- redis-cli SADD ip_blacklist 10.1.1.1
	-- remove an ip:

	require 'nokogiri'
	require 'open-uri'

	# Get a Nokogiri::HTML:Document for the page we're interested in...

	doc = Nokogiri::HTML(open('http://www.google.com/search?q=tenderlove'))

	# Do funky things with it using Nokogiri::XML::Node methods...

	####