rwrrll’s gists

rwrrll / gist:96b20f161f6c08027839cd3627e09382

Created March 26, 2018 03:17

dB / volume conversion

	float dbToVolume(float dB)
	{
	return powf(10.0f, 0.05f * dB);
	}

	float volumeTodB(float volume)
	{
	return 20.0f * log10f(volume);
	}

rwrrll / case_sensitive_net_http_headers.rb

Created October 12, 2016 16:28

Monkey patch to prevent Net::HTTP from capitalising header keys on Ruby 2.3

	# source: https://github.com/jnunemaker/httparty/issues/406#issuecomment-239542015

	module Net::HTTPHeader
	def capitalize(name)
	name
	end
	private :capitalize
	end

rwrrll / gist:a37d0ec2858b78a334ac

Created January 25, 2016 15:16

Change Google Apps primary domain (Ruby google-api-client gem)

	require 'google/apis/admin_directory_v1'
	require 'googleauth'
	require 'googleauth/stores/file_token_store'

	require 'fileutils'

	OOB_URI = 'urn:ietf:wg:oauth:2.0:oob'
	APPLICATION_NAME = 'Directory API Ruby Quickstart'
	CLIENT_SECRETS_PATH = 'client_secret.json'
	CREDENTIALS_PATH = File.join(Dir.home, '.credentials', "admin-directory_v1-ruby-quickstart.yaml")

rwrrll / gist:295cc72a9cb5bc184077

Last active August 29, 2015 14:15

Convert QuickTime screen recordings to lightweight animated GIFs.

	#! /bin/bash

	# you need ffmpeg and gifsicle installed. they're available via brew on a mac.
	# sips will already be installed on your mac.

	# you probably want an existence check here, but I'm lazy.
	rm out.gif

	mkdir pngs
	# you can change 450 to your desired output width. the aspect ratio will be preserved.

rwrrll / logmung.rb

Created October 8, 2014 17:03

Really quick and dirty hack to "parse" Rails log files looking for a request/response pair.

	filename = ARGV.first

	puts "Opening #{filename}"
	file = File.open(filename)

	puts "Reading contents"
	contents = file.read.encode('UTF-8', invalid: :replace)

	puts "Splitting into requests"
	requests = contents.split("\n\n\n")

rwrrll / Preferences.sublime-settings

Last active September 28, 2016 13:27

Preferences.sublime-settings

	{
	"bold_folder_labels": true,
	"color_scheme": "Packages/Oceanic Next Color Scheme/Oceanic Next.tmTheme",
	"create_window_at_startup": false,
	"draw_white_space": "selection",
	"ensure_newline_at_eof_on_save": true,
	"fade_fold_buttons": false,
	"font_face": "SF Mono Regular",
	"font_size": 10.0,
	"highlight_line": true,

rwrrll / gist:9972308

Created April 4, 2014 11:00

Create swap on EBS Instance Storage

	# Check for existing swaps:
	swapon -s


	# None listed? Then go for it!

	# Create ~8GB empty file
	sudo dd if=/dev/zero of=/mnt/swapfile bs=1M count=8192

	# Lock it down

rwrrll / strong_requirements.rb

Created February 18, 2014 16:36

Kinda hacky way of specifying that permitted parameters must be present in Rails' strong_parameters - use `insist` in place of `permit`.

	module ActionController
	class Parameters
	def insist(*filters)
	filters.each { \|f\| ensure_presence(f) }
	permit(filters)
	end

	private
	def ensure_presence(filter, params = self)
	case filter

rwrrll / append_routes.rb

Created October 9, 2013 10:58

Append Rails routes (without losing existing routes)

	# spec/support/append_routes.rb

	# Basically this: http://experiments.openhood.com/rails/rails%203/2010/07/20/add-routes-at-runtime-rails-3/
	# but in a re-usable block format.

	def append_routes(&block)
	begin
	_routes = Rails.application.routes
	_routes.disable_clear_and_finalize = true
	_routes.clear!

rwrrll / gist:2421335

Created April 19, 2012 14:33

Patch Rack::Test::UploadedFile to be compatible with ActionDispatch::Http::UploadedFile (avoid "undefined method 'Tempfile'" error)

Richard Worrall rwrrll