cstorey’s gists

cstorey / gist:5129666

Last active December 14, 2015 18:29

Ruby's rather non-deductive behavior difference between lambdas / procs. (Edited for coherency).

	1.9.3p0 :004 > require 'pp'
	=> true
	1.9.3p0 :002 > p = proc { \|a\| pp proc_args: a }
	=> #<Proc:0x0000010090b838@(irb):2>
	1.9.3p0 :010 > p.call(1,2)
	{:proc_args=>1}
	1.9.3p0 :008 > stabby = ->(a) { pp stabby_args: a }
	=> #<Proc:0x00000101099410@(irb):8 (lambda)>
	1.9.3p0 :009 > stabby.call(1,2)
	ArgumentError: wrong number of arguments (2 for 1)

cstorey / hack.patch

Last active December 15, 2015 21:59

Mutant crash on 39cd9d72d of cstorey/srsrb.

	Mutant configuration:
	Matcher: #<Mutant::Matcher::Method::Instance identification="SRSRB::CardEditorApp#card_models_as_dictionary">
	Filter: Mutant::Mutation::Filter::ALL
	Strategy: #<Mutant::Strategy::Rspec::Full>
	Subject: SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110
	Alive: rspec:noop:SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110:24ec0 (0.71s)
	Killed: rspec:SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110:3e242 (0.43s)
	Killed: rspec:SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110:5d14b (0.43s)
	Killed: rspec:SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110:3aca1 (0.42s)
	Killed: rspec:SRSRB::CardEditorApp#card_models_as_dictionary:/Users/cez/projects/srs-rb/lib/srsrb/rackapp.rb:110:d8c97 (0.45s)

cstorey / gosnow.rb

Created April 12, 2013 10:39

Playing around with id generation inspired by gosnow. And by "inspired by" I mean "a blatant copy of".

	require 'zlib'
	require 'socket'
	require 'thread'

	WORKERID_BITS = 10
	MAX_WORKER_ID = -1 ^ (-1 << WORKERID_BITS)
	SEQUENCE_BITS = 12
	MAX_SEQUENCE = -1 ^ (-1 << SEQUENCE_BITS)

	SINCE_MILLIS = Time.utc(2012, 1, 1).to_f * 1000

cstorey / gist:5377503

Last active December 16, 2015 04:29

Include a background worker in a heroku web dyno.

	web: (while true; do echo MARK $(date --iso-8601=seconds); sleep 5; done) & ruby --version; bin/rackup -Ilib -s puma rackup.ru -p $PORT

	# Or slightly more clearly

	web: rake resqueue:worker & ruby --version; bin/rackup -Ilib -s puma rackup.ru -p $PORT

cstorey / dump.rb

Last active December 16, 2015 04:49

	require 'hamster/hash'

	original = Hamster.hash :foo => 42
	dumped = Marshal.dump(original)
	undumped = Marshal.load(dumped)
	STDERR.puts undumped[:foo]
	STDOUT.puts dumped

cstorey / cors-lobster.rb

Last active December 16, 2015 17:59

Trivial CORS enabled lobster

	1 require 'rack/cors'
	2 require 'sinatra'
	3
	4 get '/' do
	5 "Hello world"
	6 end
	7
	8 use Rack::Cors do
	9 allow do
	10 origins 'localhost:3000', '127.0.0.1:3000',

cstorey / gist:5593323

Last active December 17, 2015 10:18

	In [17]: pytz.UTC.localize(datetime.utcnow()).isoformat()
	Out[17]: '2013-05-16T17:06:19.394052+00:00'

	In [18]: (datetime.utcnow()).isoformat()
	Out[18]: '2013-05-16T17:06:24.842408'

	In [19]:

cstorey / logger_proxy.rb

Last active December 17, 2015 12:19

Lock free Proxy class for the ruby stdlib Logger that can be used from within a signal handler. Not 100% ready for production use, as it cannot currently recover from failures of the logger thread. Lock free queue implementation based on http://www.1024cores.net/home/lock-free-algorithms/queues/non-intrusive-mpsc-node-based-queue

	require_relative 'mpsc'

	class LoggerProxy
	def initialize target
	@target = target
	@queue = MpscQueue.new
	end

	def start!
	@reader, @writer = IO.pipe

cstorey / resrv.c

Created June 28, 2013 20:27

Random reservoir sampler in C. Lacks a good deal of proper error checking.

	#define _XOPEN_SOURCE 700
	#include <stdio.h>
	#include <stdlib.h>


	int main(int argc, char **argv) {
	int size = atoi(argv[1]);
	char *resrv = calloc(size, sizeof(char));
	int i = 0; size_t nread;
	char *line = NULL;

cstorey / dbcleaner.rb

Last active December 20, 2015 11:49

A trivial Sequel database cleaner.

	require 'sequel'
	require 'tsort'

	class TableCleaner
	def initialize db, excluded_tables
	@db = db
	@excluded_tables = excluded_tables
	end

	def clean