John E. Vincent lusis

This is a little trick I use to spin up the packages instalation on Debian/Ubuntu boxes in Vagrant.

I add a simple function that checks if a directory named something similar to ~/.vagrant.d/cache/apt/opscode-ubuntu-12.04/partial (it may have another path in Windows or MacOS) and create the directory if it doesn't already exist.

def local_cache(basebox_name)
  cache_dir = Vagrant::Environment.new.home_path.join('cache', 'apt', basebox_name)
  partial_dir = cache_dir.join('partial')
  partial_dir.mkdir unless partial_dir.exist?
 cache_dir

logstash queries graphed with graphite.

Operation: Decouple whisper from graphite.

Method: Create a graphite function that does a date histogram facet query against elasticsearch for a given query string for the time period viewed in the current graph.

Reason: graphite has some awesome math functions. Wouldn't it be cool if we could use those on logstash results?

The screenshot below is using logstash to watch the twitter stream of keywords "iphone" "apple" and "samsung" - then I graph them each, so we get an idea of popularity. As a bonus, I also do a movingAverage() on the iphone curve to show you why this is awesome.

	# Return the longest path prefix (taken character-by-character) that is a prefix of all paths in array.
	# If array is empty, return the empty string ('').
	# Note that this may return invalid paths because it works a character at a time.
	#
	def common_prefix(m)
	# Given a array of pathnames, returns the longest common leading component
	return '' if m.empty?
	s1, s2 = m.min, m.max
	s1.each_char.with_index do \|c, i\|
	return s1[0...i] if c != s2[i]

	Based on Twitter conversation with @b6n

	Question 1
	The digits in the credit card pattern 4811 XXXX XXXX 2632 sum to 77, what are the
	middle 8?There are 112,400 card numbers (about 1.2%) in this range that 1) pass
	the luhn check and 2) sum to 77. The credit card isn't in great danger.

	Question 2Does the sum of the card digits make a good security question for
	phone support?The first hurdle is having a customer add the 16 digits without
	miss-adding or freaking out. Next, the numbers do cluster to the middle. A bad

	NAME=project
	VERSION=0.0.1

	DIRS=etc lib bin sbin share
	INSTALL_DIRS=`find $(DIRS) -type d 2>/dev/null`
	INSTALL_FILES=`find $(DIRS) -type f 2>/dev/null`
	DOC_FILES=.md .txt

	PKG_DIR=pkg
	PKG_NAME=$(NAME)-$(VERSION)

	-- PostgreSQL 9.2 beta (for the new JSON datatype)
	-- You can actually use an earlier version and a TEXT type too
	-- PL/V8 http://code.google.com/p/plv8js/wiki/PLV8

	-- Inspired by
	-- http://people.planetpostgresql.org/andrew/index.php?/archives/249-Using-PLV8-to-index-JSON.html
	-- http://ssql-pgaustin.herokuapp.com/#1

	-- JSON Types need to be mapped into corresponding PG types
	--

	# bindings
	unbind C-a
	set -g prefix C-z
	bind C-z send-prefix

	unbind [
	unbind %
	unbind '"'

	bind Escape copy-mode

	if not sinatra.incoming ( ngx.req.get_method() , ngx.var.uri ) then
	return ngx.exit ( 404 )
	end

	#!/bin/bash
	# WebSocket shell, start & browse to http://<Host>:6655/
	# Requires bash 4.x, openssl.
	# Author: [email protected] (which isn't me, apk)
	coproc d { nc -l -p 6656 -q 0; }
	nc -l -p 6655 -q 1 > /dev/null <<-ENDOFPAGE
	HTTP/1.1 200 OK

	<html><head><script language="javascript">
	var url = location.hostname + ':' + (parseInt(location.port) + 1);