codeslinger’s gists

codeslinger / consistent_vote_counts_in_cassandra-example_data.txt

Created August 29, 2010 10:46 — forked from mrflip/consistent_vote_counts_in_cassandra-example_data.txt

	votes CF

	"back in black" => { 201005211200 => '1', 201005201159 => '1', 201005201157 => '1', 201005011900 => '1', 201004190600 => '1' },
	"black album" => { 201005021800 => '1', 201005010600 => '1' },
	"black star" => { 201005011000 => '1' }

	cached_counts CF

	"back in black" => { 'cached_count' => 2, 'counted_until' => 201005011931 },
	"black album" => { 'cached_count' => 1, 'counted_until' => 201005010600 }

codeslinger / formula_editor.rb

Created July 25, 2010 23:13

	#!/usr/bin/env ruby
	# vim:set ts=4 sw=4 et ai:
	#############################################################################
	# Copyright (c) 2007, Toby DiPasquale
	#
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#

codeslinger / black-scholes.c

Created July 12, 2010 02:50 — forked from ecounysis/LICENSE.txt

Black-Scholes Option Pricing Model in C

	#include <math.h>
	#include <stdio.h>
	#include <stdlib.h>


	double Normal(double);
	double N(double, double, double, double, double);
	double delta(double, double, double, double, double);
	double delta2(double, double, double);
	double ND2(double, double, double);

codeslinger / install_java7_alternatives

Created June 20, 2010 16:22

codeslinger / gist:445929

Created June 20, 2010 16:20

We couldn’t find that file to show.

codeslinger / redis_pubsub_demo.rb

Created March 30, 2010 15:41 — forked from pietern/redis_pubsub_demo.rb

	# Author: Pieter Noordhuis
	# Description: Simple demo to showcase Redis PubSub with EventMachine
	#
	# Requirements:
	# - rubygems: eventmachine, thin, cramp, sinatra, yajl-ruby
	# - a browser with WebSocket support
	#
	# Usage:
	# ruby redis_pubsub_demo.rb
	#

codeslinger / foo.rb

Created March 16, 2010 20:57

problem with module attribute keeping value over multiple Rails requests

	#
	# -=[ Problem ]=-
	#
	# On the first Rails request, after calling Foo.configure in
	# config/environments/development.rb, @@provider is the correct
	# object and so Foo.doit() succeeds. On the second request, though,
	# it raises the ArgumentError b/c @@provider is now nil. What am I
	# doing wrong?
	#
	# This file lives in lib/foo.rb in a Rails 2.3.5 project

codeslinger / gist:280998

Created January 19, 2010 15:29 — forked from antirez/gist:280994

	# Power law (log tail) distribution
	# Copyright(C) 2010 Salvatore Sanfilippo
	# this code is under the public domain

	# min and max are both inclusive
	# n is the distribution power: the higher, the more biased
	def powerlaw(min,max,n)
	max += 1
	pl = ((max(n+1) - min(n+1))rand() + min(n+1))*(1.0/(n+1))
	max-1-pl.to_i

codeslinger / hash_filter.rb

Created December 23, 2009 19:24 — forked from r38y/hash_filter.rb

	require 'yaml'
	class Hash
	def filter(*keys)
	self.inject({}) {\|h,(k,v)\| h[k] = v if keys.include?(k); h}
	end
	end

	test_hash = {'one' => 1, 'two' => 2, 'three' => 3}
	puts test_hash.to_yaml

codeslinger / gist:259202

Created December 18, 2009 01:34

	(in /Users/toby/code/friendly)
	All dependencies seem to be installed.
	/opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/json-1.1.3/lib/json/common.rb:60: warning: already initialized constant State
	.................................................................................FFFFFFF.........................................................................................................................................

	1)
	NoMethodError in 'Friendly::DataStore retrieving all based on a query gets the data from the dataset for the klass and makes it an arary'
	undefined method `map' for nil:NilClass
	/Users/toby/code/friendly/spec/../lib/friendly/data_store.rb:20:in `all'
	./spec/unit/data_store_spec.rb:29:

Toby DiPasquale codeslinger