Leonid Kovnatskiy altV

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

Intro

Clojure Destructuring Tutorial and Cheat Sheet

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

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:

	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...

	####

	-- 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:

	(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

	;; 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")

	<!doctype html>

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

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

	<!-- CONFIGURATION -->